6 Pcs M35 Cobalt Countersink Drill Bit Set for Metal with Case 82 Degree 1/4'' Hex Shank HSS 5 Flute Center Punch Tool Sets for Wood, Quick Change Bit 1/4” 5/16" 3/8” 1/2” 5/8” 3/4”

Additional Details from the Manufacturer

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More features

• M35 Cobalt HSS: Super tough, resistant to wear, high thermal threshold. Designed for tackling tough materials like stainless steel and other high-performance alloys. Please ensure sufficient lubrication and cooling in extensive uses.
• Assortment of common, practical sizes 1/4", 5/16", 3/8", 1/2", 5/8", 3/4". 82-degree tip drills clean, conical holes for screwheads to sit flat. Trailling flute automatically deburrs holes.
• Five-blade design improves durability and longevity. 1/4" hexagon shank, compatible with most handheld and bench drills.
• Cobalt coating helps with wear and thermal. Please be reminded that the countersinking performance will not be impacted even if coatings are worn down. The wear and tear of coating is normal and the performance relies on hardness of the countersink bit itself.
• Highly versatile, can be used on various materials including wood, pvc, machinable metals. Compatible with hand drills, cordless drills and bench drills.