The Simson Toeclip Straps are very useful straps to secure a bike on the carrier, but they were originally designed for an old-fashioned race pedal! The straps are made of strong nylon and they have a convenient tensioning buckle. The straps are suitable for various applications and particularly suitable to very solid sercure a bike tire on the bike rack. Insert the end of the strap in the right direction through the buckle. Simply open the buckle to open the strap after use. The straps are supplied per two pieces.