Small Arbor: 3/8" Hex Shank and 1/2"-20 UNF Thread for Dia. 14mm to 30mm Hole Saw
Large Arbor: 7/16" Hex Shank and 5/8"-18 UNF Thread for Dia. 32mm to 210mm Hole Saw
One Piece in One PVC Double Blister or White Paper Box
1. Made from hardened carbon steel and alloy steel for greater durability; 2. Fits all drill chucks 3/8 in. and larger; 3. Hex shank allows higher torque applications and less slippage from your drill; 4. Supplied with a HSS pilot bit for wood and metal use;
5. Eliminates wobble between the arbor and hole saw.