Bosch 35618 18-Volt 1/2-Inch Brute Tough Drill/Driver Kit Improved performance--up to 500 (38-percent) more rpm and 50-inches-per-pound (up to 10-percent) of torque than current models Single Sleeve 1/2-inch metal chuck for one handed bit changes, increased drill bit capacity for versatile applications 25+1 clutch for precise driving applications Newly designed handle grip with finger support and two tone soft grip for extended comfort and control Variable speed trigger - for complete control