Features: *Used for controlling tightness of looseness of electric drill clamping tool. *Drill chuck wrench for electric drill clamping tool. *Metal Drill Chuck Key features a metal construction for enhanced long-time use and reliable performance. *The key has a T-shaped handle for ease of use. *Designed for use with most drill presses and most large drill presses. Specifications: Product name: Electric Hand Drill Chuck Material: High-carbon steel Color: Black Size: 10mm, 13mm, 16mm(Optional) Scope of application: Electric drill Quantity: 1 pcs Package Content: 1*Electric Hand Drill Chuck Note: 1. Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data. High quality assurance: Each product undergoes strict quality testing to ensure that you can provide the best quality experience. User-friendly design: The product features and appearance are carefully designed, easy to operate, and suitable for various usage scenarios. Multifunctional practicality: It has a variety of practical functions to meet your diverse needs and improve the quality of life. Environmentally friendly materials: Made of environmentally friendly and safe materials, harmless to the human body, while paying attention to environmental protection. Excellent cost performance: Provide excellent quality at a reasonable price to ensure a shopping experience that is worth the money.