General description This practical adjustable floor guide roller is designed for sliding doors without the need for grooves or drilling in the floor. It is easy to install and suitable for various types of doors including automatic, sliding, framed, wooden, and metal doors. Technical specifications Material: Steel Small size: 5 x 3.5 cm Large size: 10 x 4 cm Installation No door grooves required No drilling in the floor Quick and easy installation Usage Compatible with automatic doors Compatible with sliding doors Compatible with framed doors Compatible with wooden and metal doors Other information Excellent design with a silver exterior that complements most decorative styles Durable and practical for long-term use