Fits any base material solid or hollow, anti rotation features. Truly universal plug which fixes into any base material, solid or hollow Unique geometry guarantees maximum expansion and grip. Recommended for unknown substrates and exploited holes Anti-rotation features prevent spinning in the hole 100% assurance of proper anchoring derived from unique split design of the plug Lip prevents plug slipping into over-sized holes. Uno Yellow Plug 5mm Card 96 68-500 Suitable for screw range of 3.0-4.5 mm Hole diameter-5mm Applications include shelving and cabinets, suspended ceilings, switch boxes, trunking and cable trays, boilers, water heaters and radiators Unique design with expansion throughout the length of the plug Expands at the top giving instant grip Anti rotation features prevents spinning in the hole Suitable for concrete, brickwork, stone, blockwork, plasterboard, etc This pack of 96 plastic wall plugs from Rawlplug are and concrete, brickwork, stone, blockwork, plasterboard, tiled walls.