{"product_id":"knightsbridge-25mm-bi-metal-holesaw-yellow","title":"Knightsbridge 25mm Bi-Metal Holesaw - Yellow","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Knightsbridge 25mm bi-metal holesaw cuts a 25mm diameter hole through steel, stainless steel, die-cast metals, hardwood floors, plywood and plastics. The bi-metal construction combines a high-speed steel cutting edge welded to a carbon steel body, giving better wear resistance and longer life than standard carbon steel holesaws when cutting harder materials.\u003c\/p\u003e\n\u003cp\u003eDesigned for electrical installation work where a 25mm cut-out is required for cable glands, conduit entries, or accessory back boxes, the holesaw uses 4\/6 TPI variable teeth that reduce vibration and improve cutting speed across different material densities. The 38mm cutting depth allows the saw to cut through typical plasterboard-on-stud walls, timber joists and sheet metal panels in a single pass without needing to drill from both sides.\u003c\/p\u003e\n\u003cp\u003eThe yellow powder-coated finish on the steel body resists corrosion and makes the saw easier to locate in a toolbox or on a workbench. The holesaw requires the separate HSARBORS arbor (sold separately) which carries the pilot drill bit and threads into the base of the saw body. The arbor's spring-loaded ejector plate pushes the cut plug out of the saw after each hole, reducing downtime between cuts.\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\u003e25 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\u003e25 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_1474276_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 require?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 25mm holesaw requires the Knightsbridge HSARBORS arbor, sold separately. The arbor carries the pilot drill bit and threads into the base of the holesaw body, and includes a spring-loaded ejector plate to push out the cut plug after each hole.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat materials can it cut?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe bi-metal construction allows the holesaw to cut steel, stainless steel, die-cast metals, hardwood floors, plywood and plastics. The high-speed steel cutting edge gives better wear resistance on harder materials than standard carbon steel holesaws.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does 4\/6 TPI variable teeth mean?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTPI (teeth per inch) varies between 4 and 6 around the cutting edge. This variable tooth pitch reduces vibration and improves cutting speed when working across different material densities, particularly when cutting through composite materials like plasterboard-on-stud walls.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it cut through a standard UK stud wall in one pass?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 38mm cutting depth allows the holesaw to cut through typical 12.5mm plasterboard on both sides of a 50mm timber stud in a single pass, provided the drill can maintain enough torque and the arbor's pilot bit is long enough to guide the cut.\u003c\/p\u003e","brand":"Knightsbridge","offers":[{"title":"Default Title","offer_id":45293885686027,"sku":"HS25MM","price":2.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/1428942_e631146f-48a6-443b-9439-dcd0c836a20b.jpg?v=1714665530","url":"https:\/\/niori.co.uk\/products\/knightsbridge-25mm-bi-metal-holesaw-yellow","provider":"Niori","version":"1.0","type":"link"}