- Installation Made Easy: For a seamless setup, use a chopping bit that matches the diameter of the expansion screw casing. Attach it to your electric drill, ensuring the hole's depth equals the bolt length. Insert the expansion bolt set into the drilled hole for a secure fit. - Strong and Reliable: Our closed hook bolts are designed for dependable fixing of items and fixtures on concrete, brick, walls, and other solid surfaces, ensuring your installations remain stable and secure. - Precise Usage Instructions: Avoid unscrewing the nut to prevent the bolt from dropping into the drilled hole. Tighten the nut 2 to 3 turns, and when the expansion bolt is snug, unscrew the nut carefully. Ensure the fixed items align with the perforated mounting part, utilizing a gasket or spring washer for optimal tightness. - Quality Construction: Each male thread expansion screw hook anchor bolt comes with a flat washer and hex nut, crafted for performance and durability. - Practical Applications: Ideal for securing shelves, brackets, or decorative fixtures in homes, offices, or commercial spaces. Perfect for construction professionals and DIY enthusiasts alike seeking reliable anchoring solutions. - Compatibility: These expansion bolts are suitable for various applications on solid surfaces, making them versatile for different projects. - Dimensions & Material: Designed for strength and consistency, the bolts provide the necessary support for various installation needs. Make your installations secure and efficient with our robust male thread expansion screw hook anchor bolting solution.