Feature:1. OXIDATION RESISTANT CARBON STEEL: Made of excellent carbon steel, quenching and blackening of the surface, with strong oxidation resistant ability, high hardness, and long service life2. TIME AND EFFORT SAVING: Round die wire allows quick and easy installation and removal, saving your time when switching between applications3. STABLE AND WEAR RESISTANT: Firmly clamping round die, used for processing or correction of male threads, with good stability, not easy to break teeth, fast edge collapse, wear resistant, long service life4. SAFE AND REST ASSURED: Strict quality control and quality assurance, bring high safety factor, can rest assured to use5. WIDELY USED: This high accuracy round die chuck is widely used in tapping machine, drilling machine, milling machine, boring machine, pneumatic tools, etc.Specification:Item Type: Bolt Die Tapping ColletModel: GT12 M8Material: Carbon steelInterface Outer Diameter D: Approx. 19mm / 0.75inDie Mouth Internal Diameter d: Approx. 25mm / 0.98inDie Mouth Height L1: Approx. 8.5mm / 0.33inMaximum Socket Depth: Approx. 50mm / 1.97in.Package List:1 x Bolt Die Tapping Collet1 x Hex Wrench