Fully Covered Strong Magnetic Cup Holder: This magnetic cup holder works for small bottle or big cup, will not drop, allows to mount vertically or horizontally, securely attached to ferrous metal . Powerful Screw Hole Magnet: Built-in 6 strong magnets to cup holder sticks firmly to metal . Adopt magnet with 1screw holes to permanently fix magnet on cup holder. Anti-Drop: Full coverage design allows to hold water bottle or large cup without falling out. Drink holder measures 3.3 inches in diameter, and 3.6 inches in height, works for most cups, cans, cans with sleeves, bottles, tumblers, etc. Vertical or Horizontal Mount: Magnet can be fixed vertically or horizontally, you can adjust it according to your need. Cup holder works for refrigerator, tractor, school bus, mower, treadmill, toolbox, grill, etc. But can't work on stainless steel because they are not magnetic. Rust-: Cup is made of sturdy iron with thick baking , magnet is fully encased with rubber, will not rust, lasts for years. Also magnet cup holder will not scratch the of appliance. Colour:Black Material:iron Package Contents: 2 x Magnetic Cup Holder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.