High Quality Material: Made of high-quality brass, these head screw bolts are weather-resistant and durable enough to handle inclement weather with ease. Protective: Our anchor screw bolts are strong enough to hold the pool cover in place even in a storm to prevent your kids and pets from falling into the pool. Size: The length of the screws are 1.2 and the width is 0.63, fits most pool cover brass anchors. Easy of Use: Our pool safety cover threaded brass insert screw bolts are absolutely easy to use. You just need to remove the old anchor screw. Then reinsert the new head screw insert. It's finished. Not Easy to Rust: Replacement screw bolts are made of premium solid brass, great waterproof performance. So it can serve you for a long time