24-Tooth Reversible Ratchet Mechanism - Allows smooth forward and reverse rotation without removing the tool, speeding up chuck tightening or loosening during bit changes. Four Integrated Tip Sizes in One Tool - Combines 5.5mm, 5.8mm, 6mm, and 7mm chuck key tips to fit the most common 1/4", 3/8", and 1/2" drill chucks-eliminates the need to carry multiple separate keys. All-Metal Body with - Finish - Built from aluminum and steel components with a polished coating to resist rust, ensuring long service life in workshops or job sites. Fits Standard Drill Chuck Configurations - Matches typical pairings: 1/4" chuck with 6mm key, 3/8" with 5.5mm, and 1/2" chucks with either 5.8mm or 7mm-check your chuck size before use. Compact Design for Easy Storage and Carry - Saves space in toolboxes, pouches, or pockets while providing quick access to four essential chuck key sizes in a single, reliable tool., Weight: 0.25573622392 pounds, Manufacturer: Ehwisbe