Universal Mandrel for Bi-metal hole saw.
Tested design normally found only in industrial-grade chucks.
Allows for round shank drill bits to be used in 1/4 in hex quick-connect shank.
Features a non-rusting, high-performance body with a unique sure-grip sleeve for maximum user comfort and hand tightening efficiency, reduces bit changeover time and boost productivity, never a key to misplace.
Easily change from fastening to drilling with a 1/4 in hex quick connect. The DW0521 quick connect 3/8 in impact chuck is built with all-metal construction for maximum durability.