Screws features: The expansion legs for even load distribution. Remains flush with the base material. Securely locks into the base material allowing the wall fixtures to be safely removed and refitted. Provides strong hold and even load distribution to keep fixtures safely secured to the wall. Anti-rotations barbs secure fixing during installation. Can be installed using a screwdriver or a setting tool. Suitable for a large range of base materials and thicknesses. Features Color: Silver Material: Steel Size: 5.00 x 1.50 x 1.50cm/ 1.97 x 0.59 x 0.59 inch As the screw is tightened, the expansion legs expand tightly against the back of the wall. Thus, providing strength, strong hold and even load distribution to keep your fixture safely secured to the wall. The steel sleeve remains permanently fixed in the base material but the screw can be removed. Thus, allowing the wall fixtures to be safely removed and refitted Hollow wall anchors are suitable for a large range of base materials and thicknesses such as plasterboard, drywall, dry lined walls, wood and other board materials that will not support the weight of heavy wall hangings.