The makita dtd157 is a cordless brushless impact driver powered by an 18v lxt li-ion battery. It features a variable speed controlled by trigger, to deliver up to 3,000 rpm, 4,100 ipm and 140 nm maximum tightening torque, suitable for a wide range of fastening applications. It has a compact body for easy screwdriving in confined areas and is equipped with a convenient 1 4 hex driving shank for quick and easy bit installations and removals. Specifications battery voltage: 18v battery type: lxt li-ion coarse thread length : 22-90mm driving shank: 6.35Mm 1 4 hex high tensile bolt: m5-m12 machine screw: m4-m8 max fastening torque: 140 nm standard bolt: m5-m14 blows per minute hi : 0-4,100 ipm blows per minute lo : 0-2,000 ipm no load speed hi : 0-3,000 rpm no load speed lo : 0-1,300 rpm noise k factor: 3 db a noise sound power: 106 db a noise sound pressure: 95 db a vibration k factor: 1.5 M sec vibration fastening bolt : 11.5 M sec features & benefits aluminium hammer case anti bit wobbling structure assist mode for controlled screwdriving belt clip brushless motor electric brake electronic 2 speed impact power selection ergonomically designed high comfort grip forward reverse rotation led job light variable speed control by trigger contents makita dtd157 18v lxt cordless brushless impact driver belt clip no batteries no charger no case