The Kuryakyn 4619 universal motorcycle helmet lock allows you to safely and securely lock your helmet. Lock clamps directly to your motorcycle; ideal for engine guards, frame tubes, or any long section of tube. Designed with tamper-proof screws providing extra security. Includes (1) gloss black lock assembly, (2) keys, and (2) tamper proof screws. The Kuryakyn 4619 universal motorcycle helmet lock works best mounted on a 2 1/4" long section of straight tube; universal fit for 1 1/4" to 1 1/2" diameter tubing.