Features:Control the electric guitar / bass tone & volume.Small size and light weight, suitable for storage, in case of urgent need.Use these Guitar knobs to dress up your electric guitar or replace the dingy or old knobs.We have a small wrench for the knob,You may use it to adjust the shaft hole size.Compatible with most Tele Start EPI SG Les Paul style electric guitar / precision bass instruments.Fits any guitars or basses which have 6mm or less than 6mm diameter Solid or Split shaft pots.But they DO NOT fit some larger USA 1/4"(6.35mm) diameter potsSpecifications:Material : MetalColor : Black, Gold, Silver ToneKnob Inner Dia : 6MMKnob Top Diameter : 19mm/0.74"Overall Size : 22 x 19mm/ 0.86" x 0.74"(H*D)Weight : 63gPackage Included:4 x Guitar domed knobs4 x Wrench