OEM Part Number: 1619X01351, 2610320301, 2610912980, 1619X07410, 2610320391, 1619X08020 Package includes: 4 × 1619X01351 Carbon Brush. Dimensions (L × W × H): 0.51" x 0.24" x 0.24"inches Fits SKIL 77 worm drive circular saw Compatible with models HD5510 5-, 5860, SHD77 7 1/ Worm Drive , SHD77 7 1/ Worm Drive , SHD77M 7 1/ Magnesium Worm Drive , SHD77M 7 1/ Magnesium Worm Drive , HD77M-72 7 1/ Magnesium Worm Drive , 5825 6-, HD77M 7 1/ Magnesium Worm Drive, HD77, HD5510 5-, HD5860 Worm Drive, HD77-72 7-1/4 Worm Drive Saw w/Twist Lock, models: 1677MD, 1677MDT, 1677M 7-1/ Worm Drive Saw Please check your saw model and part number before ordering GEARLINTON 1619X01351 Carbon Brush Replacement Set for Skil HD77 - S77 CIR SAW, Replaces OEM 1619X08020, 1619X07410, 2610320391 (4 Pack)