1. HIGH QUALITY MATERIAL:Guitar neck shims are made of high quality solid brass material for durable use to match the guitar neck.2. FUNCTIONS:These shims worked well to elevate and angle the neck in order to give more adjustability to the bridge and to help make the setup more in line with your playing preferences.3. SIZE: The Guitar shims set includes 3 thickness sizes brass shims: 0.2mm(4Pcs), 0.5mm(2Pcs) and 1mm(2Pcs), necessary Luthier Tools for Electric Guitar Bass Players.4. WIDELY USED: The guitar neck shims are designed to fit onto most electric guitars and basses. Protect your favourite guitar from corrosion or damage.Size: 42x3.7x0.7cm/16.5x1.5x0.3inch.Colour: GoldMaterial: BrassPackage Contents:4 x 0.2mm Shims2 x 0.5mm Shims2 x 1.0mm ShimsOnly 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.