I picked up this Self Extracting QR-17 Bolt for my 24mm alloy cranks and it went in without any fuss. The kit includes the bolt, self-extracting cap and washers, so everything you need is in the bag. It is designed for FSA cranks only, so double-check your setup before ordering. Once installed, the crank arm stayed tight on my rides and the self-extracting cap makes removal simple. Solid replacement part, though I wish the threading was a touch smoother out of the packaging.