Jacobs 30250 1/2'' in. X 9/32'' in KK Chuck Key T-Handle Steel (4-Pack) Deliver precise, reliable performance when tightening or loosening drill chucks with the Jacobs 30250 Chuck Key?a durable, ergonomically designed tool built for durability and user comfort. Engineered to fit 1/2-inch drill chucks with a 9/32-inch pilot, this chuck key is ideal for use with hand drills, bench drills, and other power tools requiring keyed chuck adjustment. Its precision-machined steel construction ensures long-term accuracy and resistance to wear, maintaining smooth engagement with the chuck gears over thousands of cycles. Featuring a T-handle design with a nickel-plated thumb grip, this chuck key provides enhanced leverage and improved control, reducing hand strain during operation. The soft steel handle is designed to deform rather than fracture under excessive torque, increasing safety by preventing sudden breakage that could cause injury or damage. This makes it especially valuable in industrial and heavy-duty environments where over-torquing risks are higher. The Jacobs 30250 is a self-ejecting model, equipped with a spring-loaded ejector mechanism that automatically disengages the key after the chuck is tightened. This feature improves efficiency and safety by eliminating the need to manually pull the key out, reducing the chance of forgetting to remove it before starting the drill?a common cause of damage and accidents. Compact and lightweight at just 0.130 lb, the key measures 4 inches in length with a 1-inch height, making it easy to store in a tool drawer, machine cabinet, or tool pouch. Its robust build and dependable function make it a trusted choice among machinists, maintenance technicians, and DIYers who demand quality and consistency from their hand tools. Features - Chuck key designed for 1/2-inch chucks with 9/32-inch pilot compatibility - Precision-cut steel construction for long-lasting durability and smooth gear engagement - T-handle design with nickel thumb grip for increased leverage and user comfort - Soft steel handle resists dangerous fracturing under excessive load - Self-ejecting mechanism with spring-loaded ejector for automatic disengagement - Improves safety by preventing accidental operation with key still inserted - Ideal for use with drill presses, hand drills, and industrial equipment - Compact size for easy storage and accessibility - Lightweight at 0.130 lb for convenient handling - Durable finish resists corrosion and wear - Designed for professional-grade performance in workshop and job site environments - Made to meet the high standards of Jacobs, a trusted name in tooling solutions - No assembly or power source required?ready to use out of the box Specifications - Brand Name: Jacobs - Model Name: Jacobs 30250 - Part Number: 30250 - Product Type: Chuck Key - Type: Chuck Key - Chuck Key Size: 1/2 inch - Pilot Size: 9/32 inch - Handle Type: T-Handle - Material: Steel - Handle Material: Soft Steel - Color: Silver/Nickel - Number in Package: 1 pc - Suitable For: Drill Chucks - UNSPSC: 27112100 - ECCN: EAR99 - Nomenclature: 30250 CHUCK KEY 1/2 9/32PILOT - Each Weight: 0.130 lb - Product Dimensions: 4.00 x 4.00 x 1.00 inches - Manufacturer: Jacobs - Country of Origin: JP Product Application The Jacobs 30250 Chuck Key is engineered for reliable, safe operation in industrial, commercial, and home workshop environments. Whether used on a drill press in a machine shop or a handheld drill on a construction site, it ensures precise chuck adjustment for secure bit retention and optimal tool performance. The self-ejecting feature and fracture-resistant handle enhance workplace safety, making it ideal for high-use and high-risk settings. Trusted by professionals for its build quality and functional design, this chuck key is an essential tool for anyone working with keyed drill chucks who values precision, durability, and protection against tool failure.