Features Quick change: The hexagonal mandrel is suitable for quickly changing drills and drills, screwdrivers or screw guns Firmly inserted in the screwdriver: The 1/4 inch quick-change hex key is firmly inserted in the screwdriver and can be used immediately Long service life: drill tap set metal made of chrome vanadium steel with corrosion-resistant coating on the surface, ensures a long service life Strong magnetization design: Tap adapter strong magnetization design strengthens the safety lock and locking of nut and screw fasteners when used with an impact wrench For electric drill tools: The total length of the adapter is 48mm, and the adapter nut is M8 hex nut, suitable for electric drill tools Specification: Item Type: Power Socket Wrench Material: chrome vanadium steel Purpose: thread cutting holder adapter Adapter handle type: hex handle Adapter handle size: 1/4 inch Total length of the adapter: approx. 48 mm/1.89 inches Adapter nut: M8 hex nut Adjustment tools: impact wrench, electric drill, etc. Package list: 10 x Power Socket Wrenches 1 x Storage Box Package List 10 x Power Nut Driver 1 x Storage Box