Bosch 34614 14.4-Volt 1/2-Inch Compact Tough Drill/Driver Improved performance--up to 150 (11-percent) more rpm and 80-inches-per-pound (up to 26-percent) of Torque than current models Single Sleeve 1/2-inch chuck for one handed bit changes; increased drill bit capacity for versatile applications 20+1 clutch for precise driving applications Newly designed handle grip for extended comfort and control Variable speed trigger for complete control