The M18™ Heavy Duty Straight Grinder has a long slender spindle neck for better access to awkward spaces. REDLINK™ overload protection electronics in tool and battery. Full metal gear case for maximum durability. Digital electronic 2-speed for optimum use of consumables. Maximised airflow for cool running for extended periods. 6mm collet for use with common accessories. Battery lock out function to prevent unintended start up.