No matter the size of taps - small, medium or large the right choice of tap holder is a clutch style torque drive tap holder. These holders make tapping blind holes easy and even tap on parts that can't be easily tapped by other methods. 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. The quick change tap holder allows you to change from one size tap to another in 3 to 5 seconds. No gears head height, or stops to change.