ISE Brand. Non Genuine Replacement Trigger Interlock for Stihl Chainsaws. Replaces Part Number: 1117 182 0805. Fits Models: Stihl 021, 023, 024, 025, 026, 028, 029, 034, 036, 038, 039, 042, 044, 046, 048, 064, 066, 084, 088, MS210, MS230, MS240, MS250, MS260, MS290, MS310, MS340, MS360, MS380, MS381, MS390, MS440, MS460, MS461, MS640, MS650, MS660, MS780 and MS880 chainsaws.