JET 630400 JET 1-2-3 Block Set in Plastic Case

JET has the tool kits and accessories you need to ensure superior performance of your MIlling Machine.
Features and Benefits:
Precision 23 Hole 1-2-3 Block Set
Squareness: 0.0001"
Parallelism: 0.0001"
Height Accuracy in Pairs: +/- 0.0001"
Haedened to 56-60 RHC
5 Piece 3/8" - 16 Socket head cap screws
Hex Key included
Plastic Case