Our rubber coated magnets are designed to provide an incredible hold by increasing friction without marking or scratching surfaces. This rubber coating makes these magnets ideal for applications such as hanging outdoor signage and mounting cameras or sensors. SIZES/ ATTRACTIVE PULL FORCE CAPACITY / SCREW DIMENSIONS: 22 mm Diameter / 3.5 KG / M4 mm thread size 34 mm Diameter / 6.0 KG / M4 mm thread size 43 mm Diameter / 10 KG / M6 mm thread size 66 mm Diameter / 20 KG / M8 mm thread size 88 mm Diameter / 42 KG / M8 mm thread size