1The tapping tool handle has an accuracy of 0.01mm, with high concentricity, good processing effect, and improved machining efficiency. 2The tool holder contains a highaccuracy ball guide sleeve to reduce wear and prevent the tap from breaking and deforming. 3When processing the thread, the tapping tool holder can be extended and contracted to protect the tap when it is overloaded and stopped. 4Made of high-speed steel and quenched, it has good elasticity, wear resistance and stable performance. 5Floating and telescoping function, make slight synchronous expansion and contraction compensation during the tapping process, and increase the service life of the tap. Item Type: Tapping Tool Holder Model: BT40-GT12 Material: High Speed Steel Purpose: CNC machining center tapping tool holder Tool Handle Length: Approx. 110mm / 4.3in Chuck Size: Approx. 19mm / 0.7in Handle Taper Maximum Diameter: Approx. 44.45mm / 1.8in Applicable Chuck: GT12 TC312 G3 Application: Used for clamping during thread processing. The telescopic tapping tool holder can shrink back and forth by 5mm through the internal protection mechanism, which can protect the tap when it is overloaded and stopped. 1 x Tapping Tool Holder