Useful option to GRS Blocks and Multi-Purpose BenchMate Vise. Includes leather-faced ring clamps and a variety of pins, clamps. 30 pieces in all. Helps you quickly hold whatever you are working on. All these tools have posts that measure 3.6 mm (0.14") in diameter to fit in the GRS pin holes for the various upper jaw pin plates used with the blocks that GRS manufactures.
They fit with the upper jaw pin plates used with the following GRS tools: