Features: Brand new and high quality Made-of high quality material, durable and practical to use. The key has a T-shaped handle for ease of use. Designed for use with most drill presses and most large drill presses. Smooth lines; Precise machining dimension; Smooth metal surfaces, all this shows the progress of industrial technology. Greatly improve the accuracy, save-time and convenient for operation. Specifications: Material: 40CR Quenching Type:10mm/12mm/14mm 10mm: Diameter:Approx. 10mm/0.39inches Rod Length:Approx.160mm/6.3inches Total Length:Approx.110mm/4.33inches 12mm: Diameter:Approx. 12mm/0.47inches Rod Length:Approx.250mm/9.84inches Total Length:Approx.135mm/5.3inches 14mm : Diameter:Approx. 14mm/0.55inches Rod Length:Approx.320mm/12.6inches Total Length:Approx.135mm5.3inches Package Includes: 1x Chuck Wrench note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.