Note: The color is according to the first picture,the quantity and size are according to the title,if the title is not clearly written,according to the description.Feature:100% Brand NewUsed for tuning of Guzheng and for most machine devices that have quadrilateral opening.The shaft is made out of steel.Sturdy and smooth handle.Note: This quadrilateral shaped tuning wrench (hammer) can be used for tuning of Guzheng and for most machine devices that have quadrilateral opening.Please measure the tip size of your device before purchasing,make sure size of your device go with the measurement of the wrench quadrilateral.Side Length Of The Quadrilateral: Approx. 6.5mmOverall Length: Approx. 16cm Handle Length: Approx. 10.5cmincludes:1 x Square Shape Piano Tuner Tool