EASY TO FIX: This hanging screw hooks can be very easy to install, confirm the point which want this hook, for Wall: please drill a hole,hammer in the plastic tube to the hole, then tighten the hook with a wrench or screwer; for wood, you can use a Phillips screwdriver to screw the nail into the wooden beam or directly hammer the nail into the wooden beam with a hammer by widthwise. SAFETY CLASP DESIGN: The design of the safety clasp allows the screws to be attached to the wall or wood shelf more securely, which allows the hanger to hold up to 16 pounds and is suitable for indoor and outdoor use. Buckle design is aim for prevent wind to blow off the string lights. STURDY AND STABLE: Hanger hooks made by PP, screws are made of stainless steel, strong enough to hang and not easy to break, rust prevention and wind prevention ensure all-side security for outdoor or indoor holding. MULTI-APPLICATION:you can used it on walls, ceiling, wood, curtains, drip line, potted plants and other places you want, this screw hook set is fit for as the hooker for Wind Chime, Plants, Bird Feeder, Party Decor Hanging, can used for fix Christmas lights.A good set for Closet,under cabinet,workshop,warehouse,Garage,entrance,Bedside and Patio. 20pcs per set., Weight: 0.3527396192 pounds, Manufacturer: Suopair