ITEM NAME:MT2 Spindle to MT1 Arbor Morse Taper Adapter Reducing Drill Sleeve B1W4 MT2 Spindle to MT1 Arbor Morse Taper Adapter Reducing Drill Sleeve B1W4 Product Name : Reducing Drill Sleeve;Type : MT2-MT1 Inside Diameter : 11.8mm/0.465";Outside Diameter : 18.5mm/0.728" Total Length : 91mm/3.5";Material : Metal Color : Gray;Weight : 84g Morse taper 2# to Morse taper 1#. The Morse Taper Sleeve is mainly used in drilling machine and lathe machine. Drill sleeves is used to change the taper of the connective arbors. Morse taper shank allows the tool to be inserted directly into the machine& Package Content : 1 x Reducing Drill Sleeve Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.