Product Description: Q-Hanger Size: 3.5 x 2.9 cm. Screw Length: 2.2 cm. Hook Opening: 0.7 cm. These products can hold up to 18 kg, suitable for indoor and outdoor use. Delivery contents: 40 screw hooks. Easy Installation: The 40-pack Christmas light hooks are quick and easy to install. You can use a Phillips screwdriver to screw the nail into the wooden beam or directly drive the nail into the wooden beam with a hammer over the width. Wide Range of Uses: Q-hangers for outdoor string lights, Christmas lighting hook for the home, string lights for Halloween, string lights for holidays and patio, also perfect for hanging light items such as potted plants, flower pots, keys, wall decorations. High Quality: Wind and rust-resistant hangers for lamps and other outdoor cable hangers all year round. The open loop ensures quick release, but the extension provides complete safety. The hanging hooks hold up to 20 pounds, suitable for indoor and outdoor use. Size: 3.5 cm total length, fits many items, 2.2 cm screw length is fixed. The hook opening is 0.7 cm.