Elesa is promoting its TLR hook clamp in steel and in stainless steel, which incorporates a spring compensation system which adapts to vibration and to movement in doors or lids to maintain a consistent sealing force. These TLR spring retainers are suitable for panels on specialist vehicles such as emergency service or off-road vehicles. They are also useful on packaged equipment which is subject to movement, re-siting and vibration during operation.