KAYNES 1:24 Ratio Electric Bass Guitar Machine Heads Tuners Guitar Tuning Key Pegs Open Gear Replacement for Jazz Precision Black 1:24 Ratio with sealed lubrication, cast housings and metal knobs. provide smoother tuning and a higher degree of backlash elimination. Made of solid materials with an elegant and professional look.Open gear bass tuning machines, ,good replacement for almost electric bass. Easy to install and use. Replace your old and dirty tuning pegs and great for bass tuning. Please check the parameter drawing in the attached pics before placing your order. Package Content: 4 x Bass Tuning Pegs 4 x ferrules 4 x screws Color Black Brand Name Kaynes Instrument Guitar Finish Type Powder Coated Manufacturer Kaynes Operation Mode Manual Instrument Size 4 for Left Item Dimensions 7.09 x 3.94 x 1.57 inches Number of Strings 4 Back Material Type Basswood String Material Type Stainless Steel