This item is a fork and hammer set. It is made of aluminum alloy material, portable, practical, easy to use, and durable. It is suitable for guitar intonation inspection, and can also be used for acoustic experiments in physics class. Features -Color: Assorted Color -Material: Aluminium alloy -Size: About 17.50X2.40X1.00cm/ 6.88X0.94X0.39in -Using aluminum alloy materials as raw materials, durable and can serve you for a long time. -The aluminum alloy fork is not easy to break, can beat it with confidence. -Equipped with complete accessories, easy to use and store, storage will not take up too much space for you -Hit the fork and place the vibrating fork in the affected area to check whether the bones are broken. -A great your friends and family, it is a great product for guitar tuning, ear treatment and other great products. Package list: 1 x fork 1 x hammer 1 x wiping cloth 1 x flannelette bag