Greenlee E-Z Bore Bit Extension 5-1/2 904H2-5-1/2 Application : 5-1/2 IN. extension for E-Z BORE bits. Includes : Hex wrench and spare set-screw. Package : 1/Pk. Package Type : Re-usable storage tube Shank Diameter : 7/16 IN. Hex Shank Type : Quick Change Sub Brand : E-Z Bore Weight : 0.3 lbs. (0.14 kg)" Greenlee E-Z Bore Bit Extension 5-1/2 904H2-5-1/2