Technical Specification Hole Saw Product Grouping Hole Saw Accessories Item Arbor Extension Shank Size 3/8 Shank Shape Hex Fits Hole Saw Dia. 9/16 to 6-7/8 Material Carbon Steel Overall Length 12 For Use With For 3/8 Hex Shank Hole Saw Arbors This listing is for each. Extend you reach a full 12 inches when drilling with Milwaukee? hole saw arbors. Secures with a hex key included. The 3/8 hex fits 3-jawed chucks 3/8 drill capacity and larger. 3/8 hex shank 12 length For 3/8 hex shank hole saw arbors Shank: 3/8 Length: 12 Style: Hex-Wrench (1) 3/8 x 12 Bit Extension (48-28-4008) Item/Cat # 48-28-4008 48-28-1030 48-28-1040 48-28-1050 48-28-1060 48-28-4001 48-28-4006 48-28-4011 48-28-4016