Starrett 18A Adjustable Automatic Center Punch
- Automatic operation, single hole
- Alloy steel construction
- 0.19 ounces listed weight
- 1 year warranty on defects
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A Starrett punch with automatic operation and an alloy steel body, covered for a year against defects. The listing is thin, with no length, tip size or use guidance beyond the basics.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B0006J4Q64Model: 18ACategory: Punches
Overview
A spring loaded striking mechanism gives an automatic punch its action, so a push on the tool marks the work without a hammer. This Starrett model is listed with automatic operation, an alloy steel build and a silver and black finish.
Automatic operation is the reason to look at it, since marking without a hammer saves a hand and a step. The listing says little else, so tip geometry and overall length are left for the buyer to confirm.
Who it's for
Workshop users marking sheet metal, castings and layout points who want to work one-handed. Anyone who needs a particular tip shape or force setting should look for a model that lists those figures.
Pros and cons
- Alloy steel construction
- Warranty on material defects
- Silver and black finish
- Length not listed
- Tip details not listed
- Force adjustment not described
- Thin listing detail
Performance notes
An internal spring stores energy and releases it on a push, so the strike force is set by the mechanism rather than by a hammer swing. The result is repeatable marks across many parts. Tip condition and workpiece hardness still affect how deep the mark goes.
Specifications
| Brand | Starrett |
|---|---|
| Model | 18A |
| Dimensions & fit | |
| Pin Hole Diameter | 14.29 millimetershigher than 77% of 61 punches |
| Weight | 0.19 ounces |
| Construction & materials | |
| Material Type | Alloy steel |
| Color | Silver and black |
| Warranty & support | |
| Warranty Description | One year on defects in material and workmanship |
| Other details | |
| Operation Mode | Automatic |
| Hole Count | 1 |
| Sheet Count | 1 |
Closest rivals on specs
Fowler 52-500-290-0 Super Heavy Duty Automatic Center Punch- Item Weight 0.01 vs 0.3 pounds (-97%)
Klein Tools 66313 Center Punch 1/2 Inch- Item Weight 0.01 vs 0.25 pounds (-96%)
- Pin Hole Diameter 0.6 vs 0.5 inches (+20%)
Klein Tools 53728SEN Knockout Punch Set 1/2 Inch- Item Weight 0.01 vs 0.45 pounds (-98%)
- Pin Hole Diameter 0.6 vs 0.5 inches (+20%)
Frequently asked questions
What size hole does the Starrett 18A make?
The listing gives a pin hole diameter of 14.29 millimeters and a hole count of 1.
Is the Starrett 18A a manual hammer punch?
No. The listing gives automatic operation.
What is the Starrett 18A made of?
The listing gives alloy steel.
What does the Starrett 18A warranty cover?
One year on defects in material and workmanship.