Bosch 37618B 18-Volt Brute Tough Litheon Drill and Driver Bare Increased durability from the 1/2-inch metal chuck Features 0-425 RPM and 0-1,800 RPM and 650-Inch lbs of torque Features Bosch durasheild housing and uni-body power train to withstand real world conditions Bosch lithium-ion battery technology and proprietary electronic cell protection system Position clutch is 25 1/2-Inch metal chuck for increased durability Features 0-425 RPM and 0-1,800 RPM and 650-Inch lbs of torque Features bosch durasheild housing and uni-body power train to withstand real world conditions Bosch litheon batteries - state-of-art lithium-ion battery technology coupled with bosch's proprietary ecp (electronic cell protection) system guarantees the optimal performance of tool and batteries even for tough work conditions. 25 Position clutch