The 20mm irwin bi metal high speed hole saw is one of the most frequently used sizes in the range, ideal for standard electrical conduit installations, plumbing work and general construction tasks. This diameter accommodates many common fittings and fixtures, making it an essential size for electricians, plumbers and general contractors. Built to professional standards with bi metal construction and electron beam welded teeth, this 20mm holesaw delivers reliable, long lasting performance. The variable tooth design 4 6 pitch provides faster cutting action and enhanced performance whether you're working with wood, metal or composite materials. Features and benefits bull 20mm diameter perfect for standard conduit and pipe work bull bi metal construction ensures extended service life bull variable tooth pitch for efficient, smooth cutting bull electron beam welded teeth resist wear and breakage bull versatile material compatibility including metals and wood bull professional grade tool for trade use specifications size mm 20 material bi metal pitch variable