The 25 &27 SP Grinder can be used for the most difficult jobs as they are fitted with a heavy duty air cleaner and an electric clutch which allows the cutter wheel to engage once the operator is ready to start also allowing for the safe loading and unloading of the machine. In spite of the increased power that will tame any task, the machine can still access a 26 inch opening using the 4 inch wheels which can then be changed to 7 inch wheels for greater stability and safety whilst grinding.