Klein Tools 31872 Heavy Duty Hole Saw Kit, Includes Carbide Hole Cutters

This heavy duty hole saw kit delivers precise sheet metal cutting for trade workers and DIY builders handling electrical or plumbing installations. Equipped with durable carbide cutters, the set is built to cut quick, accurate holes in tough materials including stainless steel, mild steel, iron, copper, and brass sheet up to 3/16-inch (0.5 cm) thick.

Accuracy and control are central to the design. The included split point pilot drill bit keeps the cutter centered from the start, preventing the bit from walking across slick metal surfaces. Each cutter also features an integrated flange that acts as a physical stop, stopping you from drilling beyond the sheet metal during use.

Because the kit focuses specifically on three core sizes (7/8-inch, 1-1/8-inch, and 1-3/8-inch), it accommodates standard conduit and pipe sizes ranging from 1/2-inch to 1-inch. While effective for sheet metal up to 3/16-inch thick, it is not intended for deeper cuts or thicker structural stock outside of these specific diameters.

Verdict: This set is a solid choice for anyone needing accurate, clean holes in sheet metal for standard conduit and pipe work. The inclusion of an extra pilot bit and a molded rust-proof case makes it a practical, organized addition to any metalworking toolkit.

• Included Cutter Sizes: 7/8-Inch, 1-1/8-Inch, 1-3/8-Inch
• Conduit and Pipe Sizes: 1/2-Inch (1.3 cm) to 1-Inch (2.5 cm)
• Maximum Material Thickness: Up to 3/16-Inch (0.5 cm)
• Material Compatibility: Stainless steel, mild steel, iron, copper, brass
• Case Type: Rust-proof molded plastic

A great fit if you:

• Need clean holes in stainless steel, mild steel, brass, iron, or copper sheet up to 3/16-inch thick.
• Regularly install 1/2-inch to 1-inch conduit or piping.
• Want built-in stops to prevent over-drilling through metal panels.

Consider something else if you:

• Need hole diameters other than 7/8-inch, 1-1/8-inch, or 1-3/8-inch.
• Work with metal stock thicker than 3/16-inch.

What materials can these cutters drill through?
They are designed to cut stainless steel, mild steel, iron, copper, and brass sheet up to 3/16-inch thick.

What sizes are included in this set?
The kit contains 7/8-inch, 1-1/8-inch, and 1-3/8-inch hole cutters, along with an extra pilot drill bit and a molded plastic case.

What is the purpose of the integrated flange?
The flange acts as a stop to prevent the operator from drilling too far beyond the sheet metal.