Is the perfect addition to any security system using hollow frame door contacts. The magnets are adjustable, ensuring a secure fit for your specific needs. They are brand new and have never been used, providing reliable performance for your peace of mind. These magnets are compatible with various alarm systems and can be used in a range of industries, from facility maintenance to business and industrial settings. They are a cost-effective solution for enhancing your existing security measures without the need for complicated installation. Protect your assets with these high-quality wheel magnets.