Meant for material thickess of 3/8-1/2-inch; 5pcs, High Performance Anchor; Easy, Fast & Secure, Vibration & shock proof; Won't destory or damage walls; If you hit solid material, the anchor still holds securely, Holds up to 167lbs in 1/2-inch drywall, Screws included: #8x1-1/2-inch; pre-drilling required, Maximum working load intended as a guideline only and cannot be guranteed