HAKIMI TOOLS™ offers Extension Sleeves are used as reduction or sizing up of Morse taper tooling. Most common Extension Sleeves tooling is taper shank drills, also Morse taper reamers and other HSS cutting tools. The Extension Sleeves are hardened steel, internally and externally ground. Size adaptors from one size stepping up to the next or skipping to a couple larger sizes (ie; 2- MT sleeve); this allows a No.2 Morse taper drill to be sleeved to suit a No.3 Morse taper machine spindle. Quite often several drill sleeves are joined together to gain the required Morse taper.