This T-Handle Chuck Key has a pilot shank of 5/16" (5.9mm). It is small and light weight, pilot shank of 15/64" (5.9mm) is suitable for many brands of electric drill chucks. This is a high quality and cost effective product that will be just perfect for you. Chuck Keys Fits 5/8" Chuck.

• This is a well machined 5/16" (7.9mm) pilot shank chuck key
• This chuck key will work with many chucks including Bosch, DeWalt and Makita
• If you're looking for a quality cost-effective chuck key, a spare, or to replace that old beat up key, this new drill chuck key will work nicely

This part is compatible with:

• Superior Electric J3516A

• D1: 20.6mm (0.811")
• D3: 7.9mm (0.311")
• L1: 85mm (3.35")