[#10 x 1Inch Roofing Screw] roofing screws are designed to fix thin-gauge metal plates under 2.4 mm to wooden structures. Composed of high-strength alloy steel to provide strong toughness. An additional magnetic-absorbing driver bit available. [Convenient to Use] The self-drilling point can reduce metal shaving. Galvanized coarse thread with moderate resistance is applied to wood. Mainly used for most iron panel, steel plate, aluminum panel, wood, plastic sheet, composite board, etc. [EPDM Washer] The 1/2Inch(13.8 mm) rubber washers expand under pressure to form a weather-tight seal. And the suitable diameter tightly covers screw hole. [White Hex ] The process of baking varnish provides superior resistance and exterior protection for 5/16inch hex with high-torque drive when installed. Signal white matches popular roofing colors. [Warm Tips!] Since the coarse thread and small of screw, it is not suitable for thick metal plate exceeding 2.4mm and the connection between the metal plates! holding angle to prevent sliding when use. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:White Material:steel Package Contents: 300 * Roofing Screws 1 * bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.