Effective Dust Control: Sharp and hard-wearing, it works efficiently and the dust cover has a wide enough internal diameter to protect against dust. Wide Range of Bore Sizes: All drill bores up to 10mm are suitable. High-Quality 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 bearing, tight connection, and simple installation. Widely Applicable: Suitable for woodworking openers, bi-metal\/metal\/glass\/alloy openers, locking hole drills, compatible with cordless and hand drills, suitable for renovating thin woodworking panels such as aluminum, plasterboard, and trim board, various downlight installations. Colour: transparent color Material: polyethylene Size: 160x160mm Package Contents: 1 * Dust Cover Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.