TTC 25-Piece Metric Transfer Punch Set
- 25 punches, 1mm to 13mm in .5mm steps
- Rc 61-63 near the point, heat treated and tempered
- 4-7/8 inch punch length
- Stand included with the set
- .002 to .003 inch undersize, by diameter range
- ±.0005 stated tolerance, 8 lb set
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A metric transfer punch set that marks hole positions in half-millimeter steps and comes on a stand. Each size is cut slightly under its hole diameter, so it enters with a small clearance.
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ASIN: B00HRXB156Category: Punches
Overview
Transferring the position of a drilled, reamed or threaded hole onto a mating part is the job of this TTC set. Every punch is heat treated and tempered, and the set comes with its own stand.
A full run of metric sizes in half-millimeter steps covers a wide range of hole diameters in one purchase, and the tight stated tolerance helps the mark land on center. The limitation is the metric-only range and the mix of inch figures in the description.
Who it's for
Machine shops, tool rooms and prototype benches that locate mating holes will use the whole range. A hobbyist with an occasional single hole does not need a full run of punches.
Pros and cons
- Full metric range in half-millimeter steps
- Heat treated and tempered
- Supplied with a stand
- Undersize stated by diameter range
- Metric sizes only
- Heavy for a punch set
- Single-purpose marking tool
Performance notes
A transfer punch closely matches its drilled hole, so a tap with a hammer leaves a center mark on the part beneath. The undersize figures set the clearance and grow with diameter, while the stated tolerance limits wobble. Hardness is given near the point, where the punch takes its blows.
Specifications
| Brand | TTC |
|---|---|
| Dimensions & fit | |
| Pin Hole Diameter | 1mm to 13mm in .5mm steps |
| Undersize | .002 inch (1mm to #40), .0025 inch (2.5mm to 17/32), .003 inch (35/64 to 2 inch) |
| Item Length | 4-7/8 inches |
| Weight | 8 pounds |
| Construction & materials | |
| Finish | Heat treated and tempered |
| Included components | |
| Number Of Pieces | 25 |
| Included Components | Stand |
| Other details | |
| Tolerance | ±.0005 |
| Hardness | Rc 61-63 approximately 1-1/2 inches from the point |
Frequently asked questions
Do the TTC SSGmm punches fit inch holes?
The set is metric, 1mm to 13mm in .5mm steps. The description gives inch undersize figures for ranges but no inch punch sizes.
What does undersized mean for the TTC transfer punches?
Per the description, 1mm to #40 is .002 inch undersize, 2.5mm to 17/32 is .0025 inch, and 35/64 to 2 inch is .003 inch.
Does the TTC SSGmm set include a stand?
Yes. The description says it is supplied with a stand.
Is a transfer punch used to make holes?
No. It transfers the location of drilled, reamed and threaded holes onto the mating part.