Product Description: Product Name: Triangular Air Bit Material: S2 Steel Length: 50mm Stem Diameter: 1/4 - 6.35mm Game Specification: 5 pieces : TA1.8/TA2.0/TA2.3/TA2.7/TA3.0mm Packing: sealed bag packing Weight: about 38g/set. Surface treatment: anti-rust mirror plating Packing specification: 100*68*6.4mm 1. Made of Taiwan S2 alloy steel, the hardness reaches 58--60HRC 2. After heat treatment, it is super hard and wear-resistant, which is more than twice the service life of the same product. 3. This is an industrial grade batch nozzle for the factory assembly line. The strong magnetic electric batch nozzle is suitable for: electric batch, hand electric drill, rechargeable drill, etc.