Oval carabiners can be an engineering challenge. Because of the oval shape, the load is shared equally between the strong spine and weaker gate sides of the carabiner, which typically results in lower strength ratings than other assymetrical designs. At 20kN, we stock the Liberty Mountain Carabiner Oval Classic because of its strength-to-price ratio. Every rafter needs a few of these in their bag of tricks. The Liberty Mountain Carabiner Oval Classic is made in the U.S. by Omega Pacific. Oval carabiners are versatile and less likely to crossload than other shapes.