Rubber jaws in width 18mm(PR15 & PS15) and 24mm(PS08) are designed as conformability to metal frames. Soft rubber jaws can prevent them from being scratched when making an adjustment. Various sizes of spare rubber jaws fit for different metal frames. Both rubber covers and internal spring system improve its performance of usage. Besides, don’t worry about rubber jaws and handle cover being warred, all of them are replaceable with spare parts.
