Effective Dust Control: Sharp and hard-wearing, it works efficiently and the dust cover has a wide enough internal diameter to against dust. Wide Range of Bore Sizes: All drill bores up to 10mm are suitable. High- Material: The dust cover as a whole is made of high-pressure polyethylene, with transparent and flexible pipes that can be tightened against the wall during operation. Stable Without Wobbling: The built-in high-speed spindle ensures that the dust cover does not turn during operation and is stable. Easy To Install: Threaded bite for easy removal of the insert , connection, and simple installation. Widely Applicable: Suitable for woodworking openers, bi-metal/metal/glass/alloy openers, hole drills, compatible with cordless and hand drills, suitable for renovating thin woodworking panels such as aluminum, plasterboard, and board, various downlight installations. Colour: transparent color Material: polyethylene Size: 125x125mm Package Contents: 1 * Dust Cover Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.