Includes (1) SW77 Switch New, Bulk PackedGenuine OEM replacement partConsult owners manual for proper part number identification and proper installationPlease refer to list for compatibilityCompatible with: SkilHD5525 TYPE 2 (F01255250A) Circular Saw, HD5550 TYPE 1 (F012555099) Circular Saw, HD5575 TYPE 2 (F01255750A) Circular Saw, HD5575 TYPE 1 (F012557599) Circular Saw, HD5657 TYPE 2 (F01256570A) Circular Saw, HD5657 TYPE 1 (F012565799) Circular Saw, HD5660 TYPE 2 (F01256600A) Circular Saw, HD5660 TYPE 1 (F012566099) Circular Saw, 5825 TYPE 2 (F01258250A) Worm Drive Saw, HD77 Type 17 Worm Drive Saw (Skilsaw 77), HD77M (F012HM7702) Worm Drive Skilsaw, SHD77 (F012SD7705) Worm Drive Skilsaw, SHD77M (F012SD7707) Worm Drive Skilsaw, HD77M-72 (F012HM7772) Worm Drive Skilsaw, 5860 (F012586099) Circular Saw, 5550 (F012X55099) Skilsaw, HD5860 (F01258600A) Worm Drive Skilsaw, HD77-72 7-1/4 Worm Drive Saw w/Twist Lock, 5865 Power Saw, HD77 (F012HD77LA) Circular Saw, HD77M (F012HM7700) Circular Saw, SHD77-72 Skilsaw Worm Drive Skilsaw, BoschB5610 (0601655935) Circular Saw, 1658 (0601658039) Circular Saw, 1677M (0601677039) Worm Drive Saw, 1678A (0601678039) Worm Drive Saw, 1656 (0601656039) Circular Saw, B5700 (0601656039) Circular Saw, B5700 (0601656135) Circular Saw, 1656 (0601656139) Circular Saw, 1677MD (0601677139) Circular Saw, 1677MDT (0601677239) Circular Saw, 1677C-100 (0601677168) Circular Saw, 1677DC-100 (0601677190) Circular Saw, B5700 (0601656035) Circular Saw, B5600 (0601655035) Circular Saw, B5600 (0601655169) Circular Saw, 1655 (0601655039) Circular Saw, 1655 (0601655139) Circular Saw,