This brushless body only drill is compact, overall length is only 176mm. The DTD155 features assist Mode which helps to eliminate "screw cam-out" and "cross threading by driving at low speed until the start of tightening. This set includes x25 25mm PZ2 Black Impact drill bits and comes complete with drill bit holder DTD155 18v LXT Brushless Impact Driver Features Brushless Motor Electric Brake Variable Speed Trigger Forward/Reverse Rotation LED job Light 2-Speed Impact Power Selection Ergonomic Soft Grip Assist Mode: helps to eliminate "screw cam-out" and "cross threading by driving at low speed until the start of tightening Includes Makpac Inlay for Type 2 Case.