Easy to Install: This light holder base is easy to install and convenient to operate, it can perfectly replace the original parts without complex tools. Spring Mechanism: The mini spring mechanism of the bulb base keeps the bulb tight and firm, not easy to fall off, and safe to use. Size: The outer tooth diameter of this lamp holder tool kit is 20mm, and the total height is 35mm, please select the size according to the requirements. Model: G9 ceramic lamp holder with bracket (M10 internal tooth), please use the corresponding lamp holder according to the bulb model. High Temperature Resistance: This lamp holder has high heat resistance and high temperature resistance, and is made of premium zinc alloy and ceramics.