Makita is the leading manufacturer of professional power tools on the market. The D-35651 Extension Bar is a 12” drill bit extension with 7/16” hex shank, suitable for self-feed bits and auger bits, 9/16” (14.2mm) in diameter and larger. The D-35651 attaches to 7/16” hex shank drill bits to allow for drilling deeper into wood, is constructed from high strength steel for durability and a longer service life and has set hex screws to ensure a tight connection to the bit. The D-35651 is designed for use with drills featuring a ½” capacity chuck.