The Makita GDO810C Die Grinder offers a high, constant speed even under load and has a soft start feature. It has a maximum 8mm collet capacity and an internal labyrinth construction that seals that motor and bearings from contamination. The tool is double insulated for increased user protection. Supplied with a 6mm Collet Cone. Specification Input Power 750W No Load Speed 7,000 - 28,000/min. Collet Capacity 8mm Weight 1.6kg