Made of high-quality aluminium material, . Help you to in frets on any string instrument. Just place the right insert in the caul. This kit includes essential tools for maintaining and repairing guitars and other string instruments. Whether you're a professional luthier or a DIY enthusiast, this tool kit is perfect for keeping your instruments in top condition. Use this repair tool to repair your instrument Type: Guitar Repair Tool Application: Guitar Maintenance Feature: Metal Clamp for Stability Colour:Black Material:Aluminum Alloy Size:6.4x4x1.6cm Package Contents: 1x Guitar Metal Treatment Pyramid 1x wrench Only the above package content, other products are not included. Note: Light reflection 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.