This Jacobs steel chuck key is a must-have for anyone in need of a reliable and durable keyed chuck. With a height of 4.20 inches, length of 4.000 inches, and width of 4.70 inches, this keyed chuck is designed to fit your drilling needs perfectly. Made by APEX TOOL GROUP LLC, this chuck key is constructed with high-quality steel material to ensure longevity and strength. The Jacobs steel chuck key is perfect for use in drill chucks, chucks, workholding, toolholding, and CNC, metalworking, and manufacturing industries. It is also ideal for those in need of a chuck key that is both reliable and easy to use. With its keyed chuck type, this item is perfect for those who require a secure grip on their workpiece. if you have any questions just send us an email. Thanks for looking!