Perfect fit: replacement strap for Suunto Core High quality material: made of durable rubber, waterproof, more durable, flexible, and comfortable than other straps, including the original The strap end buckle uses a knob screw end buckle Includes screws and screwdrivers: the watch strap includes a free DIY tool hex screwdriver inside the watch strap, which comes with 2 screwdrivers and 2 screws for easy installation in 3 minutes or less Hole design: there are 15 holes in total, and the size of the strap can be adjusted according to individual wrist conditions Note: Due to different monitor settings and lighting conditions, the actual color may vary slightly from the image This product is compatible with Suunto Core models only Please verify compatibility before purchase We recommend professional installation if unsure We want you to be completely satisfied with your purchase. If you have any questions or concerns, please contact us. We are here to help and will do our best to assist you.