Keyed Drill Chuck w/Adapter, Tap Size 3/8 In., Tooling Size 1, Overall Length 3-3/4 In., Sleeve Dia. 1.26 In., Construction Steel, For Use With Air Powered Hand Tappers and Tapping Arms, Includes Chuck Key
Tap holders from Grainger make tapping blind holes easy. They even tap on parts that can't be easily tapped. The torque clutch allows the tap to stop turning when it becomes dull or encounters any obstruction that might cause tap breakage, and is adjustable for all types of materials. Tap holders change from one size tap to another in 3 to 5 seconds.