Greenlee 38507 Round Shank with Three Flat Arbor for 9/16 to 1-3/16-Inch Hole Saws Accessories Heavy duty bar stock provides

Heavy duty bar stock provides maximum leverage for moving rocks

8 Features a dual-flute: two cutting edges share the load resulting in faster drill times with less force

3 dimensional central locking mechanism

use with JET’s 1/2-Inch drive Mag Wheel Power Sockets

Greenlee 38507 Round Shank with Three Flat Arbor for 9/16 to 1-3/16-Inch Hole Saws Accessories Heavy duty bar stock providesHigh speed steel (Pilot drill bit) material; 9 16 inch Min. Hole saw size; 1 3 16 inch Max. Hole saw size; 1 4 inch Shank size; Yes supplied with pilot Drill; round with 3 flat shank shape; chuck size 1 4 inch From the Manufacturer The best arbor in the industry ensures a solid connection without any gaps or wobbling. Arbors include replaceable high speed pilot drill. Pilot drills have unique split point tip design. Use with Greenlee bimetal hole