Makita is the leading manufacturer of professional power tools on the market. The 452947-8 is a lightweight Bit Holder, constructed from heavy duty plastic for a longer service life and can be installed on either side of the Makita Impact Driver or Drill. The 452947-8 holds up to two 50mm bits for increased convenience, making swapping bits mid-job easier and more efficient. The 452947-8 installs quickly and easily. A M4 x 12 screw is required (not included). The 452947-8 fits most Makita cordless Drills and Impact Drivers.