Heavy Duty: Heavy duty metal self-drilling fixings with screws for use on all types of plasterboard. Metal self-drilling wall plugs are available in short lengths, making them ideal for drylined walls. Heavy duty metal wall plugs can be used on single or double layer plasterboard. No Pre-Drilling Required: No pre-drilling is required. You don't have to bother finding a drill bit size to pre-drill holes. Simply pierce the paper sheet and tighten the screws. Use an electric or manual Pozidriv screwdriver. Use only the screws provided. Multi-Purpose: Metal self-drilling wall plugs are designed for plasterboard walls and drylined walls. Typical plasterboard fixings include shelves, bathroom fixtures, bracket and hook fixings, hanging pictures, cable ducts, sanitary fixtures, sockets, lighting, electrical fittings and fixtures, handrails, shelves, mirrors, wood and metal laths and many more. Easy to Install: Insert the fixing point into the plasterboard until the threads of the self-drilling plug engage into the board. Keep pressure on the wall plug fixing and screw into the plasterboard until the fixing is flush with the plasterboard. Place the screws into position and tighten until you are sure they are secure. Package Quantity: Package contains 50 heavy duty metal self-drilling anchors and 50 screws. Anchor Dimensions: 13 x 31 mm Screw Dimensions: 4.5 x 34 mm