For zeroing of digital indicators
Insize 4144-315, GRANITE SQUARE, 12.4x12.4", 6928640320538
Insize 4121-5D1, AMERICAN STANDARD THREAD RING GAGE, GO, 5/16-18UNC, 6928640359149
3M 45098, Roloc Disc Pad TR, Soft 1-1/2 in 1/4-20 Internal, 7000045277
3M 28321, Clean Sanding Soft Interface Disc Pad, 5 in x 1/2 in 44 Holes, 7100009658
Insize 4144-315, GRANITE SQUARE, 12.4x12.4", 6928640320538
Insize 4121-5D1, AMERICAN STANDARD THREAD RING GAGE, GO, 5/16-18UNC, 6928640359149
3M 45098, Roloc Disc Pad TR, Soft 1-1/2 in 1/4-20 Internal, 7000045277
3M 28321, Clean Sanding Soft Interface Disc Pad, 5 in x 1/2 in 44 Holes, 7100009658
For zeroing of digital indicators
