Feature●Compatible screw hole spacing: Approx. 2.1 - 2.9 inches (53 - 73 mm) (see diagram)●Load Capacity: Can be installed with speakers up to 33.1 lbs (15 kg) on one side●Angle Function: 90° up/down, 360° rotation●Product Weight: Approx. 1.8 lbs (0.34 kg) (one side)●[External dimensions] Wall plate : 3.9 x 3.9 inches (100 x 100 mm), Speaker side plate: 1.6 x 3.1 inches (40 x 80 mm)●Materials: Steel, aluminum●Accessories: Metal fittings, basic mounting screws (wall, speaker side), Japanese installation instruction manual (English language not guaranteed)●Recommended tools: Electric drill screwdriver, horizontal device, screwdriverDescription