ZFE T/30 Quick Change Handpiece Chuck Rotary Machine Tools With 3/32" (2.35mm) Shank For Rotary Tools T/30 Quick Change Handpiece Chuck Rotary Machine Tools Quick change hand piece T30 allow you to change out accessories (burs, bits, cutters, drills, etc. with 3/32inch (2.35mm) shank) with only a momentary interruption in work and without the use of a chuck or pin and wrench ZFE T/30 Quick Change Handpiece Chuck Rotary Machine Tools With 3/32" (2.35mm) Shank For Rotary Tools Accpet Shank Diameter :3/32"(2.35mm)