7 Steel strings:Made of metal strings has long service life and resonance effect of comfortable. The volume is flexible and the tone is easy to adjust. The shorter is, the higher tone you get. These strings can offer full bright tone and beautiful sound, they are the for music enthusiast, performers, musicians. Tuning Wrench: You can use the wrench to adjust the tension of string by using turning clockwise or counterclockwise. Colour:Silver+wood Material:Wood + metal Package Contents: 7 x Laya strings 7 x studs 1 x tuning wrench Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.