The DO35 coupling is Ideal for caravans that have a pre-existing handbrake which is mounted elsewhere on the A-frame. Features: Forged yoke "Checklock" dust cap system to keep dirt out of the locking mechanism. It also gives a visual indication that the coupling is locked. Low profile bumper for improved clearance Compatible with weight distribution hitches ZN-Ni and e-coat finish for improved corosion resistance 2 stage ADR compliant locking mechanism Machined base and bolt lands for consistent mounting and elimination of bending stresses Reduced roll over risk Quiet operation No towball height restrictions Specifications: Articulation: 360° axial, minimum 70° other axes Locking: Fully ADR 62/02 compliant including automatic secondary lock Finish: Supa Alloy 5 Bolt pattern: 4 bolts at 185mm x 54mm Rating: 3.5 tonne Action: Drop-On Maintenance: fully greasable