{"product_id":"spiral-flute-step-drill-bit-4-39mm-x-3mm-increment","title":"Spiral Flute Step Drill Bit 4–39mm x 3mm Increment","description":"\u003cp\u003eThis high-performance HSS-Co5 spiral flute step drill bit is designed for fast, precise enlargement of holes in sheet metal, stainless steel, aluminium, copper, brass, and plastics. Manufactured from premium cobalt high-speed steel (HSS-Co5), it offers excellent heat resistance, wear resistance, and long service life, making it ideal for demanding industrial and workshop applications.\u003c\/p\u003e\n\u003cp\u003eThe spiral flute design provides smoother cutting action, improved chip evacuation, and reduced cutting forces compared to straight flute step drills. Covering drilling sizes from 4mm to 39mm in convenient 3mm increments, this versatile drill eliminates the need for multiple standard drill bits while producing clean, burr-free holes with minimal vibration.\u003c\/p\u003e\n\u003cp\u003eKey Features \u0026amp; Benefits\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDrilling range from 4mm to 39mm\u003c\/li\u003e\n\u003cli\u003e3mm step increments\u003c\/li\u003e\n\u003cli\u003ePremium HSS-Co5 (5% Cobalt) construction\u003c\/li\u003e\n\u003cli\u003eSpiral flute design for efficient chip removal\u003c\/li\u003e\n\u003cli\u003eExcellent heat and wear resistance\u003c\/li\u003e\n\u003cli\u003eSuitable for enlarging existing holes or drilling new holes\u003c\/li\u003e\n\u003cli\u003eProduces clean, accurate, burr-free holes\u003c\/li\u003e\n\u003cli\u003eIdeal for stainless steel, steel, aluminium, brass, copper, and plastics\u003c\/li\u003e\n\u003cli\u003ePrecision-ground cutting edges for smooth performance\u003c\/li\u003e\n\u003cli\u003eSuitable for professional, industrial, and maintenance applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTechnical Specifications\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: Spiral Flute Step Drill Bit\u003c\/li\u003e\n\u003cli\u003eMaterial: HSS-Co5 (5% Cobalt High-Speed Steel)\u003c\/li\u003e\n\u003cli\u003eDrilling Range: 4–39mm\u003c\/li\u003e\n\u003cli\u003eStep Increment: 3mm\u003c\/li\u003e\n\u003cli\u003eFlute Style: Spiral Flute\u003c\/li\u003e\n\u003cli\u003eShank: Straight Shank\u003c\/li\u003e\n\u003cli\u003eApplication: Hole Enlarging and Sheet Metal Drilling\u003c\/li\u003e\n\u003cli\u003eSuitable Materials: Stainless Steel, Mild Steel, Aluminium, Copper, Brass and Plastics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis HSS-Co5 spiral flute step drill provides outstanding cutting performance, excellent durability, and smooth drilling across a wide range of materials. Its spiral flute geometry delivers superior chip evacuation and reduced heat build-up, making it an ideal choice for fabricators, electricians, metalworkers, maintenance professionals, and general workshop use.\u003c\/p\u003e","brand":"Twin Eagle Imports","offers":[{"title":"Default Title","offer_id":52663766057247,"sku":"11-001B-C05","price":207.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0050\/2484\/1799\/files\/twin-eagle-imports-drills-spiral-flute-step-drill-bit-4-39mm-x-3mm-increment-7448727720444-1248130484.jpg?v=1783490043","url":"https:\/\/twineagleimports.com.au\/products\/spiral-flute-step-drill-bit-4-39mm-x-3mm-increment","provider":"Twin Eagle Imports ","version":"1.0","type":"link"}