Metabo HPT (was Hitachi Power Tools) MultiVolt 36 Volt 1 4 in; 1 2 in Variable Speed Brushless Hybrid Cordless and Corded Impact Driver Stryke Secure Bolt Lock: Prevents blade GlueCore Secure Bolt Lock: Prevents blade loosening for consistent performance A: It is the straight bottom rail for Fypon 5 in 0 to 900 to 2 1 lbs with battery for ease of use SPEED SELECTION: 4 Stage speed selection for precision and control during a variety of applications LED: Built in LED light effectively illuminates dark work spaces BELT HOOK: Metal belt hook so the tool is always close at hand MOTOR: Increased power and extended durability with essentially no maintenance with the Brushless motor technology PROTECTION: Triple hammer is IP56 compliant to add a degree of protection against dust and water exposure