Irwin 10501940 Cordless Multi-Purpose Drill Bit Set 7 Piece 4-12mm

This universal drill bit set is designed for cordless drills, low-speed drills, and multi-purpose drills. It features a diamond-ground 4-flute design to reduce drilling pressure and improve centering, enabling combined drilling in wood and masonry. The bits are suitable for drilling through bricks, ceramic tiles, aerated concrete blocks, wood, drywall, limestone, slate, marble, and reinforced plastics. Sizes range from 4 mm to 12 mm. The set uses a four-facet ground carbide tip and a Chrome Vanadium body with high carbon content for strength, and it is optimized for rotary drilling. In tests, it produced up to 90-129% more holes per battery charge than leading competitors.

Features

• Sizes: 4–12 mm
• Diamond-ground 4-flute design
• Four-facet ground carbide tip
• Chrome Vanadium body with high carbon content
• Rotary drilling only (not for hammer drilling)
• Higher drilling efficiency (up to 129% more holes per charge)

Technical specifications

• Compatibility: cordless, low-speed, and multi-purpose drills
• Materials: bricks, ceramic tiles, breeze block, wood, drywall, gypsum board, limestone, slate, marble, reinforced plastics
• Diameter range: 4, 5, 6, 7, 8, 10, 12 mm
• Tip type: carbide (four-facet)
• Design: diamond-ground 4-flute; single-flute option for dust removal

Only for rotary drilling — not suitable for hammer drilling.