About This Heavy-duty Impact Drill: Efficient power through Brushless Motor that delivers 443 in-lbs.(50N.m.) of Max torque to run cooler and more efficiently for longer life. 3-in-1 Functionality: Dual-speed setting(0-550 & 0-1,800 RPM) (27,000 BPM/IPM) covers a wide range of drilling, screwdriver and hammer applications with fast transition. High strength & Controllability: 1/2" high strength metal ratcheting chuck offers good bit retention and quick bit changes. Easy to control by 20+1+1 clutch setting to prevent overdriving or damaging as a ideal drill for delicate and heavy-duty task. Handy Design: Lightweight for 2 lbs, complemented by an ergonomic & rubberized handle that enhances comfort and control during extended use. Wide Application: In addition to daily use such as drilling & screwdriving, can also easily deal with concrete and brick by hammering function. Overview Brand : Dong Cheng Power Source : Battery Powered Maximum Rotational Speed : 1800 RPM Voltage : 20 Volts Amperage : 2 Amps