The ST-HS Electricians bi-metal hole saw set contains six of the most commonly used hole saws for the electrical trade. Whether you are using the 20mm or 25mm for conduit entries, or the 38mm for installing glands to your consumer unit, these 4/6TPI variable pitch, M3 HSS Bi-metal hole saws provide fast, reliable cutting, and proficient swarf removal through thin and thick gauge materials
