CLPK22-120 Bosch 12V Max 2-Tool Combo Kit (Bosch PS31 & Bosch PS41) w/ (2) 2.0Ah Batteries CLPK22-120 Bosch 12V Max 2-Tool Combo Kit uses the industry’s most advanced Lithium-ion technology. This gives the battery greater life and more run time, all in a lighter package. The lightweight design of the Bosch PS31 is ideal for easy handling in overhead operations and tight spaces. CLPK22-120 Bosch 12V Max 2-Tool Combo Kit lets you tackle professional jobs with ease. The Bosch PS41 12V Max impact driver offers the precision of variable speed, a light body, and a short head length.