Ludwig P-1763A 1" Quick Set Memory Lock for Hercules Stands, P-1610D Bass Drum Mounts, Modular Tom Mounts, Modular Bass Drum Mounts. Modular Tom Holders, Modular Tom Arms, LR-2980-MT Double Tom Holder, LT-1781-MT Double Tom Holder, 781 Classic Double Tom Holders, etc. Any 1" tubing that needs a memory lock.