Easy to lock. Just insert the slush firmly into place. Even if the dial is not aligned with the lock number, it can be locked. How to remove: 1. Align the dial with the set lock number. 2. Press the unlock button to release the inserted slass "click".

Size (W x H x D): 11.0 x 6.3 x 2.8 inches (28 x 16 x 7 cm); Can store A5 sizes; Shoulder Size: 1.0 inches (2.5 cm); Length: 28.0 - 53.6 inches (71 - 136 cm); Weight: Approx. 1