Dekton 9-piece downlight installation kit includes six hole saws made of carbon steel, designed for cutting holes in wood, plasterboard, and plastic.The set features hole saw sizes of 51mm, 60mm, 65mm, 72mm, 75mm, and 88mm, allowing for various downlight diameters.Included accessories are a drive plate, arbor, and allen key for easy assembly and use with a power drill.This kit is suitable for both DIY enthusiasts and professional electricians for installing spotlights and downlights.