Dremel 90930-05 Carbon Motor Brush Set Carbon motor brush, fits master Mechanic models: Mm3750, Mm375 & Mm3950 Type 3, 4 & 5, also fits moto-tools #'S 275, 285, 395, 410 & 595 (Type 3, 4 & 5) Restores life to your corded rotary tool Designed for Dremel master mechanic, rotary tool and contour sander models Set includes 2 brushes Replace brushes every 60 hours # Fits Master Mechanic Models: MM3750, MM375, MM3950 Type 3, 4 And 5