The high speed steel five piece hole saw set can be used for cutting holes in a sheet of plastic or steel. Can be also used for cutting thru hard objects but must be cooled down with oil or liquid in order to avoid excessive heat and blade dulling. Those are very useful for plumbing, wiring and other DYI projects.

Features:

• Each hole saw includes its own pilot bit and arbor
• Made of HSS (high speed steel) for long life and durability
• Set includes five different sizes 16mm/0.62in, 18.5mm/0.72in, 20mm/0.78in, 25mm/0.98in, and 30mm/1.18in 
• HSS hole saw is specially used on metal, stainless steel, mild steel, iron, copper and brass
• Hole saw blades are suitable for handheld electric drill and vertical electric drill

Specification:

• Model: 5PC-STHS
• Material: high speed steel
• Each blade includes a pilot bit  
• Outside diameter: about 16mm/0.62in, 18.5mm/0.72in, 20mm/0.78in, 25mm/0.98in, 30mm/1.18in  
• Length:  approx. 2.55in or 65mm  
• Diameter of shank: approx. 0.35in or 9mm  
• Color: as picture shows  
• Quantity: 5pcs per package
• Weight: 10.8oz or 306g

Please note:

• Always use oil or water when drilling through steel or high hardness objects, oil helps keeping the blade cool and extends the life of the drill bit and sharpness of the blade
• Spring can be removed if needed, but not recommended 

Package includes:  

• Set of five different size drill bits 
• Packed with a wrench
• Plastic case per drill bit