RUKO LOS-HSSCo-33mm Bi-Metal HSS-Co Hole Saw, 33 mm Diameter, 38 mm Cutting Depth, 8% Cobalt

This 33 mm bi-metal hole saw features 8% cobalt (M42) HSS-Co teeth for high heat and wear resistance, delivering clean, accurate cuts in stainless steel, steel, cast iron, aluminum, wood, plastics, and drywall.

Overview

The RUKO LOS-HSSCo-33mm is a single hole saw engineered for industrial, professional, and DIY applications. Its variable pitch tooth design reduces vibration and improves cutting performance across a wide range of materials. The welded bi-metal construction combines a tough, flexible body with hardened cobalt steel teeth for extended service life.

What stands out

• 8% cobalt (M42) HSS-Co cutting edge for superior heat resistance and durability
• Variable pitch teeth minimize chatter and provide smoother, faster cuts
• Side slots enable easy slug ejection, saving time on repetitive tasks
• Welded bi-metal construction ensures strength and long-lasting sharpness
• Compatible with most standard drill machines and arbors (arbor sold separately)

Technical details

• Diameter: 33 mm
• Cutting depth: 38 mm
• Cutting material: Bi-metal HSS-Co (M42, 8% cobalt)
• Tooth design: Variable pitch
• Construction: Welded bi-metal
• Core ejection: Side slots
• Finish: Metallic grey
• Recommended materials: Stainless steel, steel, cast iron, aluminum, wood, plastics, drywall

Our verdict

A reliable bi-metal hole saw with cobalt teeth for demanding drilling tasks. Its robust construction and efficient slug removal make it a solid choice for professionals and serious DIYers.