Undefeated in "Practical Caravan's Guide to Security": "If your looking for all out security then this is the one to buy". 75mm x 6mm thick, fixed width steel arms. Re-inforced steel cover plate in bright red powder coated finish. Sold Secure, TUV and TNO approved. High security, integrated drill and pick resistant lock. NOTE: Please contact us if unsure which model fits your wheel.