The Stainless Steel Series is our patented top-of-the-line speaker mounting solution that combines quality, durabilityand and easy installation. The OMN-10.0 is the proven choice for mounting bookshelf speakers up to 10 lbs (4.5 kg) on walls or ceilings.The polymer-injected ball controls resonance frequencies for a better sound and the ball-and-clamp design gives a greater mounting flexibility. The mount is made of stainless steel for strength and durability. Suitable for all weather use. Includes a clamp and jaw and a complete hardware kit.. Suitable for almost every bookshelf speaker Supports up to 10 lbs (4.5 kg) Thread size: 1/4 – 20 Base rotation: 360 Pan rotation: 180 Tilt rotation: +/-30