Super Wee Block Set Features include... A unique and universal holding tool for small, miniature or intricate parts, used in conjunction with larger V-Blocks. Capacity 0.030" to 9/32". Ideal holding fixture for grinding / indexing punches and pins, drilling, milling, EDM, and inspection on optical comparators. Furnished with bridges to straddle long workpieces, allowing top hold-down screw of V-Block clamp to be utilized. Hardened and high precision ground Wee Blocks, squareness and parallelism within 0.0002". Set of attractive, fitted case includes 2 Super Wee Blocks, size A 0.030" - 5/32", capacity and size B 0.050" - 9/32" capacity, Bridge A and B, plus 5 Upper Prisms, 1/8", 5/32" and 3/16" capacity.