Fowler 53-672-081-0 Shop-Blox Rectangular Gage Block Set - 81 Piece

Fowler shop-blox rectangular gage block set - 81 piece manufactured to meet n.i.s.t. federal specification asme b89. 1.9 - 2002 tolerances on length for inch gage blocks. certificate of calibration traceable to n.i.s.t. tolerances to ±.00005" 81 pcs. 9 blocks .1001" thru .1009" step of .0001", 49 blocks .101" thru .149" step of .001", 19 blocks .050" thru .950" step of .050, 4 blocks 1.000" thru 4.000" step of 1.000". in high-quality fitted wood case.