Premium Material: This set of screws and expansion bolts is made of high-strength, corrosion-resistant premium metals and plastics, making it durable, sturdy, and long-lasting. Easy to Use: Simply drill a hole in the wall, ensuring the hole's depth and diameter match the expansion bolt. Then, hammer the expansion bolt into the wall and turn the screw clockwise until it is fully locked. Practical Design: Our drywall expansion bolts feature an anti-rotation design for improved tightening force. When tightened, the grooves on the ribbed expansion bolt expand sideways, preventing the bolt from shifting once locked. Turn clockwise. Wide Range of Applications: Suitable for installing TV brackets, cabinets, shelves, lamps, curtains, and wall-mounted installations; also suitable for installing or hanging various items, including polystyrene boards, decorative panels, asbestos boards, solid and hollow boards, etc. Package Contents: This set of coarse-hole drywall expansion bolts includes 50 winged expansion bolts and 50 screws. Standard sizes and ample quantity meet your various needs. Easy to use, easy to store, saving you time and money.