Zinc Alloy Material--The ceiling hooks are made of thickened zinc alloy,this material is tough and durable,rust and corrosion resistant,capable of hanging mug,jewelry and other items. Classic Appearance--The silver surface makes our products look classic and special,whether it is used as a festive decoration or for daily use,it is very eye-catching. Screw-In Design--With the screw-in design,no extra screws are required,just insert our screw-in hook into the wood wall and screw it tight,or fix it into the concrete wall with an expansion pipe. Wide Applications--Suitable for home,office,both indoors and outdoors,can be used for hanging cups,mugs keys and other gadgets. Package Content-8pcs ceiling cup hooks, the expansion tubes are included. Total size:4cm*5cm., Manufacturer: INCREWAY