Ride Magazine Best Buy. 14mm diameter hardened steel pin. Hardened steel body. Sold Secure GOLD. Anti-humidity cover. 1 year warranty. Exclusive design: frontal locking system incorporating four steel balls. 10 disc double locking system. Reversible key. Anti-drill. Anti-pick. Storage bracket included with disc lock.PLEASE NOTE: requires a minimum 14mm diameter hole in the brake disc - please check if unsure.