How to Choose Welding Table Clamps
Match clamp opening, throat, contact pad and table connection to flat stock, tubing and upright work.
Read the guidePRODUCT DETAILS
BuildPro Inserta Pliers with 3.4-Inch Throat
The PTT634K Inserta pliers use a 5/8-inch table insert and a rear crank handle; Strong Hand lists a 3.3-inch opening and 3.4-inch throat.
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BuildPro
What to know before ordering
- The listing dimensions differ from Strong Hand’s current PTT634K specifications; confirm the supplied model before buying for a close fit.
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Choose the exact configuration shown in the listing. Price, seller and availability are confirmed at Amazon.
Specifications & listing details
| Detail | Documented value | Evidence |
|---|---|---|
| Model | PTT634K | Amazon listing |
| Insert | 5/8 in | Amazon listing |
| Throat | 3.4 in | Manufacturer |
| Opening | 3.3 in | Manufacturer |
Listing checked September 17, 2026. These are documented claims, not independently measured results.
Manufacturer references
Buying and setup guides
Welding Clamps vs Magnets: Holding and Positioning
Decide when a welding magnet helps with fit-up and when mechanical clamping is the better choice.
Read the guideDo You Need an Aluminum Table to Weld Aluminum?
Choose a table for aluminum fabrication by clean support, mechanical workholding and joint access. Understand what an aluminum tabletop does and does not solve.
Read the guideCompare other options
BuildPro · clamp
BuildPro Inserta Pliers with Two-Inch Throat
BuildPro’s PTT522K pliers provide a smaller 2.3 inch opening and two-inch throat around a 5/8 inch insert.
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BuildPro · clamp
BuildPro Eight-and-a-Half-Inch Inserta Clamp
The UEN5200 Inserta clamp is listed with an 8 1/2 inch opening for taller workpieces.
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Turnirace · clamp
Turnirace Six-and-a-Half-Inch Welding Table Clamps
These Turnirace clamps list a 6.5 inch opening for table-mounted workholding.
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