High-quality material: made of high-quality and rust-proof plastic, for use. Easy to install and use. A great replacement for your vacuum cleaner. Universal Adapter -- The adapter can hold 42mm vacuum cleaner, 25mm attachments, the large end attaches to the hose or rod and the small end takes 25mm inner diameter, so your vacuum cleaner can have more choice of brushes, convenient to use. Problem solver for any workshop - connect your vacuum cleaner / wet dry vacuum cleaner / multi-purpose vacuum cleaner / workshop vacuum cleaner with any tool that has a dust extraction sleeve Areas of application: circular saws, jigsaws, saws, belt , random orbital , etc., reducers of different types of vacuum cleaners.