Makita 5" Angle Grinder w/ Variable Speed, Mechanical Brake & Slide Switch"SJS" (Super Joint System) prevents kickback during wheel lock up for optimal tool and operator protection Electronic current limiter protects motor from accidental overload Thumb switch conveniently located for operator comfort Removable side handle can be mounted on left or right side of tool Tool less wheel guard adjustment Active Feedback sensing Technology (AFT) automatically shuts down the tool if there is a sudden drop in rotation speed (e. g.