Set of 13pc Magnetic Screw Bits Holder for Dewalt or Makita cordless 10 pcs Magnetic Bit Extensions 3Pc Hex Socket Sizes: 1/4, 5/16 & 3/8 These bit extensions measure approximately 2-1/4" and 1-1/2" long Great for Use with Multiple Screwdriver Bits  Unlimited Uses in Automotive Garages, Warehouses, Offices, Homes Etc