This rotary knob is made of material, metal hole, 360 degree turning, a built in screw make it can be adjustable. Decorate your furniture or various appliances, musical instruments. A good accessory to replace your broken knobs. Features - Color: Assorted color. - Material: . - Size: 2.30 x 2.30 x 1.70cm/ 0.90 x 0.90 x 0.67 inch. - The knob is suitable for potentiometer, guitar effects, guitar amplifiers, speakers, etc. - The product design is ergonomic and easy to install, will not affect the use of your instrument. - This knob which is resistant to strong and dirt. Feel better and last longer. - for control the effect of a variety of functions, such as level, speeds, voice, etc. Can be used for synthesizers, electric guitar, etc. - Knobs is made of with set screw. Fits smooth shaft diameter pots. Package list: 10 x knob caps