Features Alloy Steel: This spindle adapter made of alloy steel is strong, corrosion resistant, wear-resistant and has a long service life. R8 to MT4: Specially designed for R8 spindle to MT4 mandrel morse, please distinguish the model carefully before purchase. Widely used: the taper adapter is mainly used for the use of MT shafts, taper drill bits and reamers. IDEAL REPLACEMENT - Advanced technology and quality, a perfect replacement for your old or broken spindle adapter. FLAT APPEARANCE - With a flat appearance you can install the cone adapter securely into your machine and start working immediately. Specification: Item Type:Taper Adapter Mode: R8 to MT4 Material: alloy steel Product Size: Length (L): approx. 240 mm / 9.45 inches; diameter (D): approx. 31.267 mm / 1.23 inches. Pull rod thread: 7/16" to 20" Cone: R8. Package list: 1 x cone adapter Package List 1 x Taper Adapter