Features: The cap design features a reinforced base to prevent breakage, enhancing safety during operate. The see-through body allows for easy monitoring of the drilling position and dust accumulation. This set offer three different diameters: 11mm, 18mm, and 22mm, providing adaptability for various cutting needs and tool. Craft from quality PC , these hole cutter dust cover is robusts, resistant to damage, and reliability for prolonged use. Easy to install without the need for additional tool, these dust cover save time and effort during setups. Suitable for use with metal hole cutter, joint hole cutter, and wall hole cutter, these dust cover is ideal for cutting into wood, plasterboard, and plastic, effectively reducing dust and maintaining a clean workspaces. Specifications: Component: PC Inner Hole Diameter:Approx.11mm/0.43in, 18mm/0.7in, 22mm/0.86inch; Craft: Clear design Can be used in alloy hole openers, wall hole openers. Suitable for opening operations of wood, gypsum board, plastic and other materials, dustproof design effectively reduces dust pollution and improves cleanliness of the working environment; Package Includes: 1set/3pcs Dust Bowl note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.