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 90575, Regalite Hookit Heavy Duty Discs 5RQC60-8, 5 in x 8 hole, 60 grit, 7010331757 