Specification Brand : Yuecoom BulletPoint1 : Main Effect R8 to MT4: Specially designed for R8 spindle to MT4 arbor morse, please distinguish the model carefully before purchasing. BulletPoint2 : High Quality: Made of alloy steel, this spindle adaptor is strong, corrosion resistance, wear resistance, and comes with a long life span, impact resistance, high accuracy, and high internal and external smoothness. BulletPoint3 : Flat Appearance: Spindle adapter with a flat appearance, you can safely install the taper adapter in your machine and put it into use immediately. BulletPoint4 : Widely Applied: Advanced technology and quality, a perfect replacement for your old or broken spindle adapter. The taper adapter is mainly used for the usage of MT shank, taper shank drills, reamers reducing. BulletPoint5 : Size and Specifications: Morse taper adapter length (L) Approx.240mm/9.45in, Diameter (D) Approx.31.267mm/1.23in. Drawbar Thread 7/16in to 20in, Taper: R8. FinishType : Finish IncludedComponents : inc ItemName : R8 Spindle to MT4 Arbor Morse Taper Adapter, Alloy Steel Flat Appearance Spindle Adapter, Drill Adapters for MT Shank Taper Shank Drills Reamers ItemPackageQuantity : 1 ItemTypeKeyword : taper-shank-drill-bits Manufacturer : Yuecoom Material : Material PartNumber : Yuecoomc38h6g9dvm PowerSourceType : PowerSource ProductDescription : 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