{"product_id":"32mm-bi-metal-holesaw-for-electrical-installation","title":"32mm Bi-Metal Holesaw for Electrical Installation","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Knightsbridge 32mm bi-metal holesaw is a cylindrical cutting tool with variable 4\/6 teeth per inch (TPI) designed to drill clean circular holes through steel, stainless steel, die-cast metals, hardwood flooring, plywood and rigid plastics. The 32mm diameter matches the standard cut-out requirement for many electrical socket boxes, downlight housings and cable access grommets in commercial and residential installation work.\u003c\/p\u003e\n\u003cp\u003eThe bi-metal construction combines a high-speed steel cutting edge welded onto a flexible spring steel body, allowing the holesaw to withstand the heat and torque generated when cutting through harder materials like stainless steel or mild steel plate without the teeth fracturing. The 38mm cutting depth handles most standard wall thicknesses, electrical back boxes and worktop installations in a single pass without needing to drill from both sides.\u003c\/p\u003e\n\u003cp\u003eThe yellow powder-coated finish provides corrosion resistance during storage and helps identify Knightsbridge tooling on site. The holesaw requires a separate arbor (HSARBORL, sold separately) to attach to a standard power drill or drill press. The variable TPI tooth pattern balances cutting speed in softer materials like plywood against durability in harder metals.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e32 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecessed Depth\u003c\/td\u003e\n\u003ctd\u003e38 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCut-out Diameter\u003c\/td\u003e\n\u003ctd\u003e32 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eYellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/products_1525070_datasheet.pdf\" target=\"_blank\"\u003eProduct Specification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat arbor does this holesaw need?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis holesaw requires the Knightsbridge HSARBORL arbor (sold separately) to mount onto a power drill. The arbor includes the pilot drill bit and the threaded attachment that holds the holesaw securely during cutting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat materials can it cut?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe bi-metal construction handles steel, stainless steel, die-cast metals, hardwood floors, plywood and rigid plastics. The 4\/6 TPI variable tooth pattern provides a balance between cutting speed in softer materials and durability in harder metals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow deep can it cut in a single pass?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 38mm cutting depth handles most wall thicknesses, electrical back boxes and worktop installations in a single pass. For thicker materials exceeding 38mm, you would need to drill from both sides or use a holesaw with greater depth.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this suitable for cutting socket back box holes?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 32mm diameter matches the standard cut-out for many electrical socket boxes, downlight housings and cable access grommets used in UK residential and commercial electrical installation work.\u003c\/p\u003e","brand":"Knightsbridge","offers":[{"title":"Default Title","offer_id":45293885751563,"sku":"HS32MM","price":3.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/1428944_6aa13494-f74d-439c-9825-f612671688c4.jpg?v=1714665533","url":"https:\/\/niori.co.uk\/products\/32mm-bi-metal-holesaw-for-electrical-installation","provider":"Niori","version":"1.0","type":"link"}