Ronix M2 HSS Twist Drill Bit Set 7.5mm 10pcs RH-5386 Features: Fully Ground Premium High-Speed Steel M2, especially designed for heavy duty purpose, effect clean & smooth holes on hard metal like stainless steel and moreover, at least 3 times longer life. Precision ground point, flutes, body, clearance and drill diameter for the ultimate in accuracy and performance. Hardened &Tempered with Silver color finishing for higher Durability and efficiency. Ground flutes provide fast chip removal to maximize accuracy and efficiency along the full working surface of the bit. Specifications: Model: RH-5386