The cutting strength of this tool is the result of a process called electron beam welding, whereby the teeth, made of extremely hard metal, are welded edge-to-edge to a carbon steel body. Needless to say, they will have no problem with the hardest woods you can throw at them. This comprehensive kit combines a range of 12 bi-metal hole saws with 3 arbors and 3 pilot bits, all in a durable, compact case.

• Includes (1) 3/8" and (2) 1/2" arbors.
• High speed cutting edge-super hard tool steel Rc 65-66 means long life.
• Electron beam weld-for stronger, longer lasting teeth.
• 4/6 variable TPI reduces harmonic vibration, increasing the life of the tool.
• Bi-Metal construction for long life and shock resistance.
• Variable gullet depths provide more efficient chip clearance.
• Space saving, compact case design.
• Includes additional compartments for organization and storage.
• Extremely durable.