Wolf Tooth Direct Mount Chainring - 34t RaceFace/Easton CINCH Direct Mount Drop-Stop B For Boost Cranks 3mm Offset BLKCNC machined aluminum ring fits Race Face cranks with Cinch System Features Drop Stop tooth design to prevent unwanted chain drop Asymmetrical tooth shape for the best wear life, chain retention and mud clearance Drop Stop B is compatible with 10 11 SRAM 12sp chain and Flat Top Transmission chains. Not compatible with Shimano 12 speed Made in the USA from 7075 T6 aluminum alloy Specifications: ring type single (anti chain drop) mount Cinch DM 3mm