Useful for holding taps, drills, reamers and other small tools to be turned by hand. The jaws are hardened. The frictionally held handles can be removed or positioned so that leverage can be applied when working in close proximity. Available sizes. Size A: Tap size capacity: 1.6 to 4.7mm (1/16-3/16in), square shank capacity: 1.6 to 4mm (1/16-5/32in), body length: 50mm (2in). Size B: Tap size capacity: 5.5 to11mm (7/32-7/16in), square shank capacity: 4 to 6.4mm (5/32-1/4in), body length: 65mm (2.1/2in).