Item Type: Tapping chuck Pattern(Optional): M6 Suitable Screw Tap Size: (Shank Diameter x Square Bottom): Approx. 6 x 4.5mm / 0.24 x 0.18in M8 Suitable Screw Tap Size: (Shank Diameter x Square Bottom) : Approx. 6.2 x 5mm / 0.24 x 0.2in M10 Suitable Screw Tap Size: (Shank Diameter x Square Bottom): Approx. 7 x 5.5mm / 0.28 x 0.22in M12 Suitable Screw Tap Size: (Shank Diameter x Square Bottom): Approx. 8.5 x 6.5mm / 0.33 x 0.26in Package List 1 x Tapping Chuck 1Entitle with good clamping strength, in high accuracy, such tapping chuck can keep long service life. 2Also, the chuck can make quick and safe replacement of tapping chucks, which is for connection to drill chuck adapters. 3Torque tapping chuck prevents taps from breaking, which is asy to use in the practical life. 4Meanwhile, it is widely used in tapping machines, drilling machines, milling machines, boring machines, electric tools, pneumatic tools and other equipment with reversible spindles. 5Furthermore, its installation is simple, also it does not require particularly complicated operations.