A3.15 Standard Centre Drill, High-Speed Steel 90-Degree Centre Drill, DRINYOUNG (Type A, A3.15（90°） 10pcs)

A3.15 Standard Centre Drill, High-Speed Steel 90-Degree Centre Drill, DRINYOUNG (Type A, A3.15（90°） 10pcs)

• 【Product Details】 Material: HSS Model: Type A 90° Diameter: 3.15mm / 0.12in Cutting Edge Length: 3.9mm / 0.15in Shank Diameter: 9mm / 0.35in Overall Length: 50mm / 1.97in Quantity: 10pcs Note: All measurements below are taken manually and may contain discrepancies.Please refer to the actual product for accuracy.
• Distinctive Features of the 90-Degree Design 90° Tapered Bore: The machined centre hole features a 90-degree angle rather than the standard 60 degrees, resulting in a significantly steeper drill point angle.
• Precise Guidance, Prevents Walking & Skidding Its pre-formed 90° conical hole provides accurate and reliable initial guidance for subsequent drills, effectively preventing bit slippage, deviation, or "walking" at the start, ensuring hole position accuracy.
• Protects Drill Bits, Extends Tool Life By providing excellent initial centering and guidance, it significantly reduces impact and lateral stress on the drill bit during the starting phase, preventing chipping or breakage and markedly extending the service life of expensive drill bits.
• High-Speed Steel (HSS) Madefrom high-quality High-Speed Steel (HSS), it balances hardness and toughness, withstands the impact of guide drilling.