Product Name: Replacement Bit Holder Part number: N449701 Size: 3.00 X 0.50 X 0.40 inches For Dewalt 2034 Type 10, 2034 Type 100, 2034 Type 101, 2034-10 Type 1, 2034-10 Type 2, 2034-10 Type 3, 2037 Type 100, 2037 Type 101, 2037-09 Type 3, 2037-220 Type 101, 2037W Type 100, 2038 Type 100, 2038 Type 101, 2038-220 Type 101, 2049K Type 100, 2121 Type 100, 2125 Type 100, 2127-SBD Type 100, 22637 Type 101, 2660W Type 100, 27132 Type 1, 27146 Type 1, 2802K Type 1, B2660 Type 100, DC520K Type 1, DC520KA Type 1, DC520P Type 1, DC520W Type 1, DCF620B Type 1, DCF620D2 Type 1, DCF620D2-AR Made of highly durable materials, rigorously tested, compact and sturdy in structure, easy to install, saving time and money.