Material: metal. length: 16 cm. with strong adhesive, they can be used for many years without screws. use on painted walls. it is recommended not to use the product for 24 hours after initial bonding. more than 15 orders of this product can be placed. swordslife reserves the right to withdraw orders of 15 pieces. more than 10 stocks are available for sale from the campaign price. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.