Techniks 84127-9/16 | 1-1/4" Sleeve x 9/16" Sleeve OD x 2.560" Projection Length Tool Steel Reduction SleeveMilling Chuck Reduction Sleeves allow you to change tool shank sizes just like you would collets to maximize your milling chuck's capability. Sleeves are available in both Inch and Metric sizes. All surfaces are precision ground for maximum accuracy and offer T. I. R. of only 0. 0001". Product Specifications UNSPSC Code 27112808 Series 1 1 4" Reduction Sleeve Capacity (in) 0. 5625 0. 5469 Capacity (mm) 14. 288 13. 891 Type Milling Chuck Reduction