This is a die grinder kit. It includes 2 grinders and a rotary burr set. Both grinders feature rear exhaust.
Burr set comes in a tray
Burr set includes SA-5: cylindrical shape 1/2 in. x 1 in., SA-3: cylindrical shape 3/8 in. x 3/4 in., SC-3: cylindrical radius end 3/8 in. x 3/4 in., SC-1: cylindrical radius end 1/4 in. x 5/8 in., SD-1: ball shape 1/4 in., SD-3: ball shape 3/8 in., SF-3: tree shaped radius end 3/8 in. x 3/4 in., SF-5: tree shaped radius end 1/2 in. x 1 in.
Increased motor size provides more power
1-grinder is a composite body 1/4 in. die grinder and the other is a composite body 1/4 in. 90° angle die grinder