M2 Replacement Kit - Knob/Reel/Tool/Lace Combo FIT SYSTEM: BOA M2 fit system for fast and effortless on/off and custom fit. Devil's Canyon Women's Darkhorse Darkhorse *Also compatible with products from: SIMMS, Under Armour, LLBean, Burton, Irish Setter, and any other Boa M2 fit system.Features Include:Works with Devil's Canyon, Women's Darkhorse and Men's DarkhorseBacked by rock solid guaranteeReplacement KitKeep them goingSelf repair to get back out there.