Super Vee Block Set - USA | A unique and universal holding tool for small, miniature or intricate parts, used in conjunction with larger V-blocks | Furnished with bridges to straddle long workpieces, allowing top hold down screw of V-block clamp to be utilized | Hardened and high-precision ground | With fitted case | Includes 2 V-blocks: 0.030~ .156" & .050~ .281" capacity , 2 bridges and 5 upper prisms: 1/8, 5/32 & 3/16" capacity