This is a string winder plug, using sturdy materials, safe and durable for . An excellent string winder plug that can you , allowing you to have comfortable experience, will not deform or break easily, with high hardness, serve you very well. Features -Color:Black -Material:Plastic, metal -Size:6.50X2.40X2.40cm/2.55X0.94X0.94in - The design of the acoustic guitar string winder plug string changes faster and easier than before. - Connects the guitar string winder to a power screwdriver or drill, easy to use and convenient to store. - Accommodates vintage to modern guitar and bass tuners in one size fits all designs, the electric string winder plug fits your demands perfectly. - Using sturdy materials, the replacement guitar string winder will not deform or break easily, withstand . - Simple design, the guitar string winder drill can be suitable for most kinds of guitars. Package list: 2 x string winder plugs