2 Set Musical instrument accessories: 1 Set x Drum Keys & 1 Set x random color Winding string Device Small and exquisite appearance, it is convenient to carry.excellent durability.Matched with an acoustic guitar nut, a classical guitar saddle, and 6 pieces of bridge pins. Light weight, it is easy to use.Suitable for most acoustic and electric guitars.MATERIAL: Metal construction, solid and to use, for easy carry FITS- all Drums with 1/4in Socket Square Tension Rods.CONTINUOUS MOTION SPEED KEY- a handy speed key, which is terrific when changing drum heads PRACTICAL- great for adjusting the tension rods on drums for the desired pitch.The regular keys have the right size, weight and feel for tuning drums, plus there's 3 of them, in case you lose one (which you probably !). It also comes with a handy speed key, which is terrific when changing heads. Pins Length:29.3mm String Winder Length:72mm / 42.7mm Nut Size:81.7mm FUNCTION: essential drum accessory make sure your drum are always in fine tune colour: Silver + Black + + Random Color Material: Metal + ABS + Plastic Note: Random color, don't accept the specified color. Package Contents: 4 x Drum Keys 1 x random color Winding string Device 2 x pillow 6 x color guitar chords nail 6 x black guitar chords nail 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.