Fit most speakers weighing up to 10lbs (4.5 kg). Thread size: 1/4" 20 thread, or 4mm, 5mm. Fits key holes mounting. Perfect adjustment: tilt +/-30 degrees, 180 degrees pan and rotate 360 degrees Ideal for mounting home theater satellite speakers on ceiling or wall (drywall/rocksheet) Clamping design supports fasten the ball, making it tilt and rotate flexibly Standard hardware pack included. Black color