1. The height of the seam can be adjusted: the adjustable range is 30-49mm 2. Nylon shell material, zinc alloy lock body, strong and durable. 3. Anti-theft and tamper-proof design: use ordinary tools such as needle-nose pliers, screwdrivers, ordinary tool-type keys and other common tools to rotate the lock cylinder, the lock cylinder can only rotate 360 degrees and cannot drive the lock bolt; you need to insert a special tool-type key, Press and rotate inwards to drive the deadbolt 4. This type is a safety tool lock with high anti-theft performance, rotating torque, firm and durable, and can be opened with a key. 5. Secure your or yacht with this set of door locks and keys, a must have for every trip.Whether you're parked at a campsite or docked at a port, these locks provide added peace of mind and protect against theft.With their fashion design and convenient access, these locks not only offer security but also add a touchness of style to your vehicles doors.these locks are simple to install and use. Product name:Anti-pry type RV cabin door lock Product application:Cabin door locks for , yachts, engineering vehicles, etc. Protection class:IP65 Colour:Black Material:Nylon+zinc alloy Size:Hole size:21MM diameter round hole, spacing 38mm, two 8mm diameter holes Package Contents: 1 x Door Lock with Keys Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.