Establish a More Secure Speaker Connection Extend the connection security of your speaker stands with the K&M 21444 Easy Lock adapter sleeve. Sweetwater sound experts find that this helpful adapter works with all common speaker stands with a tube diameter of 35mm (1.377 inches). The 21444 sleeve mounts and secures to the existing stand via a clamping screw; it holds down the speaker tightly through its patented expanding mandrel with quick-release fasteners. These expanding plastic splints keep the speaker-to-stand connection free of vibrations for optimal sonic performance.K&M 21444 Easy Lock Adapter Sleeve Features: Makes for a more secure connection from stand to speaker Works with all common speaker stands with a tube diameter of 35mm (1.377 inches) Easily tighten via clamping screw Patented expanding mandrel with quick-release fasteners keep your speaker's stand connection rock solid and vibration-free