100% Brand New and High Quality !20T bevel gear, the tools column is iron, and the gear enamel are plastic. Every 2 can be matched collectively to form a 90-degree transmission structureNumber of teeth: 20 teethAperture: 8mm (with height cord gap at the side)Modulus: 1 modulusUsage: Purchase 2 components to variety a 90-degree transmission structureMaterial: The silver gear column of this tools is iron, but the black tools teeth are plasticSize: Overall peak 15mm, silver cylinder diameter 18mm, tools section diameter is set 26.5mmPackage Included:1set