From the manufacturer Makita DTW190Z Equipped with Battery Protection Circuit Designed to protect the battery from damages due to over discharge, high temperature or overload current Capacities: 1/2″ square driving shank. Standard bolt M8 to M16. High tensile bolt M8 to M12. Up to 3,000 ipm. Up to 2,300 rpm. DTW190Z 18V Li-ion LXT Impact Wrench – No batteries included Cordless Impact Wrench with an optimal tightening torque of 190 Nm The DTW190Z is a cordless impact wrench, powered by 18V Li-ion battery (not included) to deliver up to 190 Nm maximum tightening torque and 320 Nm nut busting torque. Variable speed control by trigger for precise fastening, forward / reverse rotation, electric brake for increased operator safety and built in LED light with pre-glow to illuminate the work area. Compact and lightweight, only 176mm long Not Recommended for Scaffolding Applications. Accessory shown not included.