Starrett 18A Automatic Center Punch with Hardened Steel Metal, Universal Tool for Machinists and Carpenters with Adjustable Knurled Cap to Control Blow Force, No. 4 Graduation

(10 customer reviews)


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PRE-DRILLING TOOL: The 18A Automatic Center Punch is a tool with a conical point, which is used making an indentation in an object This allows you to safely drill a hole at the same spot without slipping STEEL CONSTRUCTION: This Center Punch is made of hardened steel and has a knurled finger grip for ease of handling and greater punching control Its tempered head makes it less likely to fracture from a hard, off-center blow NO HAMMER NEEDED: This punch has a mechanism that automatically strikes a blow when downward pressure is applied No hammer is required, making one hand always free to steady the work ADJUSTABLE FORCE: For a heavy mark, the cap is screwed down. Progressively lighter marks are obtained by turning the cap upward Marks made by the point are uniform in depth and size for each setting REMOVABLE POINT: The point can be easily removed for regrinding and/or replacement Always wear safety goggles when using striking tools
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SKU: B0006J4Q64 Category:

From the manufacturer


Starrett LogoStarrett Logo

The L.S. Starrett Company, founded in 1880, manufactures more than 5,000 variations of Precision Tools, Gages, Measuring Instruments and Saw Blades for industrial, professional and consumer markets worldwide. Starrett, a manufacturer of fine precision tools in industry for over 130 years.

Starrett 18A Automatic Center Punch with Adjustable Stroke

These punches and nail sets are universally used, but most often by machinists and carpenters. They are well-proportioned for ease of use. The specially selected tool steel is hardened and tempered to the proper hardness. All of them feature nicely knurled finger grips for ease of handling. A special tempering process makes the head less likely to fracture from a hard, off-center blow. ALWAYS WEAR SAFETY GLASSES WHEN USING STRIKING AND STRUCK TOOLS.

  • All Steel Construction is hardened and tempered
  • Force is regulated by the adjustable knurled cap
  • Point can be removed for regrinding
  • No. 4 graduation – 8ths, 16ths, 32nds, 64ths




Rugged automatic punches with all-steel handles and parts

Internal mechanism automatically – strikes a blow when downward pressure is applied

Spring tension, which regulates the blow, is constant so marks made by the point are uniform in depth and size for each setting





Starrett 18A Automatic Center Punch with Adjustable Stroke

Starrett 18AA Automatic Center Punch with Hardened Steel Metal, Universal Tool

Starrett 18C Automatic Center Punch with Heavy Duty Hardened Steel Metal

Starrett Automatic Center Punch, Model 818
Item Weight ‎3.17 ounces N/A ‎4.9 ounces N/A
Product Dimensions ‎1 x 1.1 x 5.5 inches 1 x 0.7 x 4.1 inches ‎5.4 x 1.1 x 0.4 inches 1 x 1.1 x 5.5 inches; 2.4 Ounces
Material ‎Steel ‎Steel ‎Steel Steel
Shape Round Round Round Round
Batteries Included? No No No No
Batteries Required? No No No No
Item Package Quantity 1 1 1 1



Part Number


Item Weight

‎3.17 ounces

Product Dimensions

‎1 x 1.1 x 5.5 inches

Item model number


Is Discontinued By Manufacturer





‎Center Punch





Item Package Quantity


Batteries Included?


Batteries Required?


Warranty Description

‎One Year on defects in material and workmanship





Customer Reviews

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Best Sellers Rank

#11,747 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #3 in Center Punches

Date First Available

April 1, 2006

10 reviews for Starrett 18A Automatic Center Punch with Hardened Steel Metal, Universal Tool for Machinists and Carpenters with Adjustable Knurled Cap to Control Blow Force, No. 4 Graduation

  1. Jim

    This thing is fantastic. I haven’t had any problems with misfiring like some other reviewers were mentioning. If you do end up with a dud somehow (unlikely) you can have Amazon replace it, or you can always send it to Starrett for free repairs. Starrett has always been super good about honoring their warranty in my experience.If you are using this for fine woodworking, I would recommend the 18AA instead. This is a great multipurpose punch for both metalworking and rougher woodworking.

  2. Byland

    One thing I’ve always done is buy the best tool that I can afford at the time (go cheap, and you may eventually spend the same amount buying multiple anyway). This has worked on all surfaces that I’ve used it on- aluminum and multiple types of steel. The point is still sharp. It makes a very distinct start to any hole needing drilling. I primarily use it as the first “hit” for staking things that go pew pew, and finish it off with the Mayhew 3/32 punch. Great tool.

  3. Ron Ramsey

    Some time ago, I bought a General Tools automatic center punch &I was always disappointed with it. It was always very hard to push to get it to trigger, no matter how I adjusted it. Also, the tip would always loosen with each punch. But the worse thing is no matter how I had it adjusted, & no matter how carefully I pushed down, When it triggered, the tip ALWAYS jumped off the cross scratch about a 64th of an inch. No good for any precision work. With this Starrett punch I don’t have ANY of these problems. The mark is not quite as deep as my old one, but if the job requires a big deep mark, I just put a regular center punch in the little dimple & use a hammer to make it deeper. After putting up with my old General for too long, I’m a happy camper now.

  4. CJ

    I work in tooling and design and we have a zero millimeter tolerance so accuracy is everything and this thing delivers. I’ve used it several times and the tip is as sharp as when it arrives. In my field starrett is well known and they delivered with this. So accurate rather than a mallet and center punch. It’s also tension adjustable so you can use it on composites with out chipping it. Super high quality. Nice box. Would say I’d buy again but probobly will never have too.

  5. J Osborne

    I had one of these gems for over 20 years, on my third point, and someone walked away with it. Got by with an inferior and irritating model from General and decided to pick up tried and true again. If this is a tool you use much at all, it is so worth spending the extra dollars on the Starrett. I was a little concerned after reading some reviews here that said it was jamming and that it wasn’t machined as well, had debris or was dry, etc. Pleased to report that mine is every bit as well machined and finished as the one I got in the 90s. Clean inside, impeccable threading, properly and lightly lubed, anvils are polished for smooth operation, still a nice aggressive knurling, works a treat. I’m not an anti-China guy at all but I’m really happy to support genuine US manufacturing and that’s getting harder and harder to do these days…glad that Starrett has remained through all of the upheaval and changes over the last few decades while so many others have capitulated into a reduction in quality and/or function, or disappeared altogether.

  6. King Carson

    This is my second Starrett Automatic Center Punch. The first one I bought 6 years ago and it has been handed down to a journeyman on my team and he is using it daily.Guys on my team have used several different brand Auto Center Punches over the years. Starrett makes the best… hands down. With others the center point starts to dull over time or the mechanism starts to malfunction and it is worthless. I used broken off-brand with a hammer and it exploded into pieces…. so don’t do that.

  7. Craig P. Donovan

    Back in the day I was calibrator and used lots of Starrett gear and never realized they made auto punches. I went looking because I lost my Home Depot “General” punch. I think it cost about 1/8 the price of the this one but damn what a difference. This thing punches like a mule (or maybe it was the 18C)…Does not matter both are awesome!I was almost thought I had received a defective one when it came. For some reason I could not get it to punch on pressing it. Then I pressed harder and still could not get it to go so I took it apart. I think its only 4 parts or something but I found the issue. I figure this one was build on a Friday or just before a holiday because it still had some machining bits inside the mechanism causing it to jam. Shame, shame on QC. No worries though as a quick cleaning and a bit of new lube and it was as good as new…because it was new. I thought this was weird because I had just purchased an 18C and it worked right out of the box. These work so much better than the junk you buy at the Depot or Lowes. This is one of those “lifetime” tools you can give to your great, great grand kids.

  8. WB Halper

    After coping for many years with a General center punch, I finally decided to buy a Starrett. There’s no comparison. The mechanism is smooth and it releases with a substantial snap. I replaced the point on the General many times…if the point was even slightly loose, the mechanism broke the threads when it released. This guy has a different design and there’s nothing to break. The 18A is the weaker of the 18A/18C pair. If you’re working with wood, aluminum and other soft material, the 18A is perfectly adequate. If you’re working with iron and steel, the 18C has a harder strike and is a better choice.Absolutely no complaints A solid five stars

  9. Jay Barron

    The title says it all. I’ve spent more money on replacing cheap center punches that didn’t work or suddenly quit working for no reason (other than their poor quality) than the Starrett cost. You pick this up and you can FEEL the quality! And the first time you use it-wow! This thing is amazing and I really do wish I’d avoided going on the cheap and just bought the Starrett years ago!

  10. Miles

    We had some cheap auto punches at work that were complete garbage so I got used to simply using a punch with a hammer, but I decided to see what was out there and came across this one. I love everything made by starrett i’ve ever had, and one of their products for $35 is kinda rare so I bought it. Works incredibly well. I use it almost everyday at work.

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