Invisible Anti-collision Magnetic Floor-mounted Door Stop Bedroom Door Catch Wall Protector Rustproof door holder open stopper classroom to keep door open on 90 degree metal Features: brand new and Sturdy stainless steel casting structure, rust-proof and wear-resistant, easy to use. Use Distance: Approx. 8-10mm/0.31-0.39inch. Features a powerful magnet system to securely hold your door. Two installation methods: perforated or no perforation can be selected. Non-marking adhesive installation, firm and stable. Punching installation, for load-bearing and for stability. Suitable for living room door, hotel door, bedroom door, etc. Specifications: Material: 304 Stainless Steel Size: As Shown Use Distance: Approx. 8-10mm/0.31-0.39inch Package Includes: 1x with Screws & Stickers) Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.