DeWalt DC936KA - Heavy-Duty XRP™ 1/2" (13mm) 14.4V Cordless Hammerdrill/Drill/Driver Kit. The DC936 14.4 Volt XRP ½ hammerdrill/drill/driver uses a DEWALT built high power, high efficiency motor to deliver 335 unit watts out of power for maximum performance in all drilling and fastening applications.