Features 1、R8 to MT4: Specially designed for R8 spindle to MT4 arbor morse, please distinguish the model carefully before purchasing. 2、Alloy Steel: Made of alloy steel, this spindle adaptor is strong, corrosion resistance, wear resistance, and comes with a long life span. 3、Flat Appearance: With a flat appearance, you can safely install the taper adapter in your machine and put it into use immediately. 4、Ideal Replacement: Advanced technology and quality, a perfect replacement for your old or broken spindle adapter. 5、Widely Applied: The taper adapter is mainly used for the usage of MT shank, taper shank drills, reamers reducing. Specification Item Type: Taper Adapter Mode: R8 to MT4 Material: Alloy Steel Product Size: Length (L): Approx.240mm/9.45in; Diameter (D): Approx.31.267mm/1.23in Drawbar Thread: 7/16in to 20in Taper: R8 Package List 1 x Taper Adapter