Squareness of both V grooves to front and back sides: 197_in
Hold cylindrical workpieces for inspection and machining.
Two V-blocks per set.
Made of alloy steel.
Hardened to HRC60?2.
V groove on the top for large shafts.
V groove on the bottom for small shafts (except 6896-10).

3M 28713 ROLOC DISC PAD TR, HARD 4 IN 5/8-11 INTERNAL, 7010298961
3M 85492, Scotch Foil Tape 3311-10A, 2.0 in x 10 yd (50.8 mm x 9,1 m), 7010383663
3M 45094, Roloc Disc Pad TR, Soft 2 in 1/4-20 Internal, 7000045278
3M 45100, Roloc Disc Pad TR, Hard 1-1/2 in 1/4-20 Internal, 7000045286 
