Item Type: Round Die Collet Model: GT12 M3 M6 Material: Carbon Steel Interface Outer Diameter D: Approx. 19mm / 0.75in Die Inner Diameter D: Approx. 20mm / 0.79in Die Height L1: Approx. 3.4mm / 0.13in Maximum Threading Depth: Approx. 45mm / 1.8in Package List 1 x Round Die Collet 1 x Hex Wrench 1MAIN PURPOSE: The chuck can firmly clamp the round die, mainly used for processing or correcting male threads, compact and practical. 2EASY OPERATION: The circular die threading chuck allows rapid installation and removal, saving time when switching between applications. 3CARBON STEEL: The chuck is made of excellent carbon steel, quenched and blackened, with high hardness and good oxidation resistance. 4GOOD PERFORMANCE: With exquisite workmanship, the die chuck has good stability, not easy to break, has high safety factor, ensures reliable operation. 5WIDE APPLICATION: The die chuck is widely used in tapping machine, drilling machine, milling machine, boring machine, pneumatic tools, etc.