7/8in. L-Rod (large end fits directly in MCM or L-Rod rack clamp)LR-78 7/8in. L-Rod with large rubber vibration reducing insulator helps to reduce cross talk. Fits Concert Cast toms and snares. If you are purchasing a Concert Cast today, you may want to throw one of these and a MCM or L-Rod clamp into your cart as well. Unless you are like so many drummers and have an abundance of extra hardware lying around.