Cassette Lockring Tool with Guide Pin For Shimano® CS, SRAM, SunRace, Chris King compatible cassettes and Shimano® Center Lock disc brakes, Cr-V steel. The guide pin prevents the tool from slipping out of the spline of the cassette lockring. For use with 1/2" driver (#53D4) or 21mm spanner. Payment we only accept PayPal payments. Make sure you have a PayPal account and funds available in the account before placing your order. If you place an order and cannot pay within 3 days with PayPal, then our system will open an "unpaid item dispute" and you may lose the right to purchase from us in the future.