Safety door locks with roller cams Locking: manual ‚¬â€œ Unlocking: manual The roller cams are operated via cylinder key. G.U-SECURY R 4 Advantages: The adjustable roller cams (8 mm height, Ø 11 mm) optimise the closing pressure in the upperand lower zone of the door thus providing high thermal and sound insulation. In combination with other locking components such as solid deadbolts and locking clawsG.U-SECURY R door locks offer the highest possible degree of security. Suitable for timber, PVC and aluminium doors. Optimum corrosion protection with hardware surface sealing ferGUard*silver. G.U-SECURY R locks are available in the current versions of centres, backsets, forends and spindles for timber, PVC and aluminium doors. For the complete G.U-SECURY range see our order catalogue "Safety door locks, aluminium thresholds and door closers for timber, PVC and aluminium doors".