Sealey Jacking Beam 3 Tonne Arm Extenders & Flat Roller SJBEX300Fully certified and approved to comply with MOT requirements. Features 2 stage mechanical safety lock and telescopic finger guards to prevent accidental injury. Supplied with two pairs of aluminium support blocks. Beam has spring loaded flat arms with roller bearings when unloaded, these support the weight of the beam, allowing the entire unit to run smoothly along the pit or ramp, but when loaded locate the unit firmly. Optional hook arms supplied.