M35 FourGroove Step Drill — 1/8'–1/2' (13step) Key benefits Greater cutting stability: Fourgroove design reduces flex and vibration during cutting, giving more consistent, accurate holes than ordinary step/ladder drills. Longer life and faster cutting: Made from M35 cobalt speed steel with a TiAlN coating, this step drill delivers up to twice the service life of ordinary ladder drills and faster hole cutting, especially in hard metals. Better performance on stainless steel and hard materials: The combination of M35 cobalt steel, TiAlN coating, and a 135° tip angle is optimized for drilling harder alloys where ordinary drills struggle. What makes it stand out Material: M35 cobalt speed steel — hardness, red hardness, and wear resistance. Offers higher toughness and bending strength than ordinary HSS for reliable performance on tougher materials. Coating: TiAlN (Titanium Aluminium Nitride) — provides hardness, oxidation temperature, strong adhesion, good thermal hardness, low friction, and low thermal conductivity to reduce heat buildup. Tip geometry: 135° cutting angle — more suitable for drilling hard materials than a standard 118° tip, improving bite and reducing walking. Specifications Model: M35 FourGroove Step Drill Size range: 1/8' to 1/2' (13 step sizes) Steel: M35 cobalt speed steel Coating: TiAlN Tip angle: 135° Recommended use and care Cooling: speed rotation increases tip temperature. During continuous drilling, use cutting oil or spray water to cool the drill and effectively prolong service life. applications: optimized for stainless steel and other hard metals; also suitable for a variety of sheet metal tasks where precision and tool life matter. Practical applications (examples) Stainless steel fabrication: clean, accurate holes in stainless panels, brackets, and enclosures. Electrical/HVAC installation: quick holes in junction boxes, panels, ductwork, and metal conduits. Automotive and plumbing : drilling through metal bodywork, brackets, and fittings where durable, consistent cutting is required. Performance summary More stable cutting with fourgroove design Longer service life (approximately twice that of ordinary ladder drills) Improved drilling accuracy and faster cutting speeds Optimized for hard materials and stainless steel due to M35 steel, TiAlN coating, and 135° tip angle Usage tip Apply cutting oil or intermittent spray cooling during continuous operation to reduce heat and extend tool life.