Description The anchor is made from carbon steel that resists corrosion, is nonconductive for anchoring electrical components, and is low-friction to facilitate screw installation. Before the screw can be inserted into the anchor to create a secure hold. The fins on the anchor head grip the mounting material to prevent when a screw is inserted, and the anchor will stay in place if the fastener is removed, facilitating fixture and screw changes. Features - Color: Silver. - Material: Carbon steel. - Size:8.00 x 3.80 x 0.80cm/ 3.14 x 1.49 x 0.31 inch. - Constructed from durable carbon steel to last for years. Self-drilling screws kit is made of steel. - Useful for different needs, hanging bathroom, kitchen accessories, shelving, light fixtures, mirrors, picture frames, and more. - Residential drywall anchor provides a firm hold to thick drywall. - Anchor affixes to the wall before adding the bolt and fixture, allowing one-person installation and fixture changes. - The split in the ribbed anchors expand on two opposing sides as you tighten the screw, increased holding power. Package list10 x screws