ALARMED TRAILER LOCK 
Suits boat, jet ski and tradie trailers, plus more. Heavy duty ultra strong stainless steel trailer lock. 18mm stainless steel U Bar. Waterproof, drill and saw resistant. Built in 120db alarm system. Rechargeable polymer lithiumion battery. Lock includes set of 3 keys 
Stainless Steel Key-barrel 
Hardened U-Bar
Steel Casting Lock
100% Preventing Rust
18mm Ultra Strong U-bar