The DGA506 18V Mobile Brushless Angle Grinder features an electric brake and side switch. This grinder is ideal for end users looking for the safety and efficiency of an electric brake previously only seen in Makita s AC grinders. This unit replaces the DGA504Z. Powered by Makita s 18V Lithium-Ion technology and powerful patented designed BL Brushless Motor, the DGA506Z is designed to suit the needs of tradies looking for a powerful mobile alternative for grinding and cutting anything from steel to concrete. The DGA506Z Angle Grinder also features Automatic Torque Drive, kickback detection, Soft start and anti-restart. Features and Benefits: Electric brake quickly slows the wheel rotation to a complete stop after the switch has been disengaged Soft start allows slower initial .