The Irwin 9 Piece Bi-Metal Hole Saw Set is a versatile cutting kit designed for drilling clean holes through multiple materials. This comprehensive set is housed in a protective soft storage case with an unbreakable hinge and internal padding to safeguard the contents during transport and storage. The case features an integral handle for convenient portability, making it ideal for contractors and tradespeople working across different sites. Constructed from bi-metal material, these holesaws deliver exceptional durability and longevity when cutting through aluminium, copper, iron, stainless steel, wood and zinc. The precision set teeth ensure faster penetration through various materials, whilst the electron beam weld creates a stronger bond between the cutting edge and body for longer lasting performance. The variable pitch tooth design optimises cutting efficiency across different applications. This set is particularly suitable for electricians installing cable entry points, plumbers fitting pipe penetrations, and carpenters creating holes for lock assemblies and hardware installation. Features and Benefits: • Bi-metal construction provides toughness and extended working life • Precision set teeth for faster, cleaner penetration through materials • Electron beam welded teeth ensure superior strength and durability • Protective soft case with unbreakable hinge safeguards holesaws during storage and transport • Variable pitch design for efficient cutting across multiple materials Contains: 6 x Holesaws: 22, 29, 35, 44, 51 and 64mm 1 x 9.5mm Mandrel for holesaws 14 to 30mm 1 x 13mm Mandrel for holesaws 32 to 210mm 1 x Pilot Drill Specifications: Material: Bi-Metal Pitch: Variable