Specially designed air inlets for optimal air flow and cooling. Small gear head for working in tight spaces. Gear head can be rotated in 90 degree steps. Armoured coils that protect motor against sharp grinding dust for longer service file. Auto cut-off carbon brushes. Two-motion switch for maximum user's safety. Spindle lock for easy disc change. Anti-rotation protective guard to provide reliable protection. Side handle can be used on right or left.