For aligning heavy duty wardrobes, bookcases, modular furniture Independent black plastic guide to prevent floor scratching Material Zinc alloy Adjustment facility Height adjustment 25 mm Drive Hexagon socket SW5 at top Installation Plate has spikes which are easily hammered onto cabinet bottom edge, then secured in position by a countersunk 18 mm length screw from underneath first and also 2 pan head x 18 mm length screws from the side secondly if required Ø 8 mm through hole in the base of the cabinet, allows you to adjust the leveller from the above, by using a SW6 hex key or a blade screwdriver (Ø 12 mm through hole required for screwdriver access) Order reference Order Hospa Ø 4.0 countersunk and Ø 4.0 pan head screws separately