Abstract: A restraint system for a driver of a vehicle comprises at least one protective bar (6), being supported on at least one pillar (2). To achieve an alignment, at least one protective bar (6) is pivotably supported by at least one eccentric (8). The protective bar is lockable.

Abstract: Stabilizer for a lower link of a three-point hitch of a tractor, comprising a first stabilizer member and a second stabilizer member connected to the first stabilizer member by a spring mechanism which allows a longitudinal movement between the stabilizer members, wherein the overall length of the stabilizer is adjustable by rotating the stabilizer members against each other. Furthermore, a blocking means is connected to the first stabilizer member, wherein the blocking means can be moved into a closed position in which a longitudinal movement between the stabilizer members is restricted. The first stabilizer member comprises a rotation-symmetric locking collar which engages the blocking means in the closed position such in that a longitudinal movement between the stabilizer members is disabled, wherein a rotation between the stabilizer members is lockable by a safety means, wherein the safety means comprises a spring clip engaging a recess formed in the circumference of the locking collar.