New! Jacobs® #30250 1/2-inch Chuck Key, 9/32” Pilot, Model KK
It has 10 teeth, a T handle type, and soft steel handles. The chuck key is for use with chucks 1/2MC, MC4K, MC8K, U8K, DC8, SM8, 74K, 76K, 77K, 78K(1/2″), 22BA, 23BA, 24BA, 26BA, and 29-33. Made in China.