Features: Accuracy engineered motor shafts collet chucks adapter with JTO base ensures 3.17mm exact alignment, featuring vibrations reducing design and upgraded brass construction for long lifespans than standard steel. solid brass brass body resists wear/corrosion while tool release installation structure simplifies quick attachment/detachment operations in industrial environment. Ideal for accuracy focused professional like operators, manufacturing technicians, and maintenance engineers requiring reliable toolholder solution. Optimizes workflows in high frequency equipment replacement scenario including production line adjustments, lathes maintenance, and multiple machine workshop setups. Universal compatibility addresses crosses device mismatching issue by supporting various 3.17mm motor shafts and JTO collet systems, streamlining industrial equipment management. Specifications: Material: Brass Size: 20mm/0.78inches long, 3mm/0.12inches shafts diameter Package Includes: 1Set accuracy Motor shafts Collet Sleeve note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.