05146ac7_r_Drills___Climbing___Climbing__Hand_Drill
[Category] Size [Power Drill] At 12.25” long, a drill like the Bosch 11536C-1 seems manageable when comparing its length to a hand drill, but it is nearly as large in width as well. The sheer bulkiness of power drills makes them harder to pack for long hikes to remote areas. (Imagine filling three Nalgene bottles taped together side by side.) [Edge] Hand Drill [Hand Drill] 
Much slimmer and more portable than a power drill. Hammers typically won’t exceed a foot in length, like the popular Petzl Tam Tam (10.4” long). The hand drill’s narrowness and two-piece setup (hammer and drill) make it as easy to stow as a couple of cams.
Smackdown! Hand Drills vs. Power Drills - Climbing | Climbing
Hand Drill