GRAPHITE Juego de sierras de corona bimetálicas con 8% cobalto, 9 piezas (19, 25, 30, 35, 40, 68 mm)

For electricians, plumbers, and HVAC technicians who need clean, precise holes in wood, drywall, plastic, and thin metal, this 9-piece bi-metal hole saw set from GRAPHITE delivers professional results. The set includes six hole saws in common diameters (19, 25, 30, 35, 40, and 68 mm), two arbors, and a pilot drill, all packed in a sturdy storage case. The hole saws are made from bi-metal with 8% cobalt (Co8%), ensuring high durability and a long service life even when cutting abrasive materials. The variable pitch tooth design reduces vibration and improves cutting performance, while the hexagonal shank provides a secure grip in both corded and cordless drills. With a maximum cutting depth of 38 mm, this set is ideal for installing downlights, creating pipe penetrations, and cutting holes for locks and cable entries.

Key specifications

• Set contents: 6 hole saws (19, 25, 30, 35, 40, 68 mm), 2 arbors, 1 pilot drill
• Material: Bi-metal with 8% cobalt (Co8%) for high durability
• Maximum cutting depth: 38 mm
• Arbor shank: Hexagonal, 10 mm
• Pilot drill: HSS (high-speed steel)
• Tooth design: Variable pitch for reduced vibration
• Storage: Durable plastic case
• Compatibility: Corded and cordless drills

Why choose it

The 8% cobalt alloy in the bi-metal construction gives these hole saws exceptional heat resistance and wear resistance, allowing them to cut through tough materials like mild steel and non-ferrous metals without losing their edge. The variable pitch teeth minimize vibration, resulting in smoother cuts and less user fatigue. The set covers a wide range of diameters, making it a versatile addition to any toolbox. The included arbors are designed for different size ranges, ensuring a secure fit and easy saw changes.

Ideal use cases

• Installing recessed lighting in drywall or plasterboard ceilings
• Drilling holes for pipes and cables in wood and plywood
• Cutting openings for locks, handles, and vents in metal doors
• Creating holes in plastic enclosures and junction boxes
• General maintenance and repair tasks in construction and renovation

Good to know

The set is packed in a durable plastic case that keeps all components organized and protected. The pilot drill ensures accurate centering and prevents wandering, while the hexagonal shank prevents slipping in the drill chuck. For best results, use a slow speed and light pressure when cutting metal, and always wear appropriate safety gear. This set is a reliable choice for professionals who need consistent performance on the job site.