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 11837, 3M Cubitron 3 Flap Disc 1169F, 60+, T29-Conical Quick Change, 4-1/2 in x 5/8 in-11, 10 ea/Case, 7100380349 