Gibraltar 4-Pack Memory Locks 1 in.

Package of 4 memory locks in a choice of 3 sizes:

1"-diameter Memory Lock SC-ML1

3/4"-diameter Memory Lock SC-ML34 (fits older Pearl, older Sonor, older CB, older Remo, and others)

7/8"-diameter Memory Lock SC-ML78 (fits most current Pearl, current CB, older Mapex sets, and others)