1、ALLOY STEEL MATERIAL: Made of premium alloy steel material, the drill sleeve adapter holder is rust resistant, strong and sturdy, ensures a long life span. 2、FINE WORKMANSHIP: The drill sleeve adapter is well crafted with smoothly and delicate surface that ensures smoothly operation. 3、EASY TO INSTALL: The drill sleeve adapter is small and compact in size, light in weight that you can quickly complete the installation and put the adapter into use. 4、WIDE APPLICATION: The drill sleeve adapter holder is widely used for spindles of drilling machines and lathes, extended drilling machines, radial drilling machines, boring machines and turret lathes. 5、IDEAL REPLACEMENT: The adapter is an ideal replacement for the old and damaged parts for better working performance.