Based on this product's specifications, here are some alternatives and similar models
Hole saw Irwin 10504190 Bi-metal 64 mm, variable tooth pitch 4.5/5.5 TPI, Weldtec
Summary description:
Irwin 10504190 is a 64 mm bi-metal hole saw with Weldtec construction and a variable tooth pitch of 4.5/5.5 TPI. Designed for cutting through metal and other materials, this hole saw combines durability of bi-metal with a tooth geometry aimed at efficient cutting and chip evacuation. Suitable for installers and tradespeople for creating circular holes in sheet metal, pipes and structural components.