8mm Shaft with Thick Outer Casing High Speed Cleaning DN50-100, Cutting DN50-75 & Brush Coating DN50-150 Range: 16m. Max Range: 26m with extension. Weight: 33kg. Standard Battery Weight: 3.5kg 800-2200rpm Stepless Speed Control (forward & reverse) The cordless battery powered Mini Miller makes quick work of cleaning, descaling, root removal, cutting, reinstatements & brush coating. Easy to transport and operate regardless of power outlet locations or availability! Includes Standard Battery for up to 3 hours of continuous work. Can also be used with power cable. High Output Battery (Weight: 4.1kg) upgrade for up to 4 hours of continuous work sold separately.