LIBERTY STEEL OVAL CARABINERS CLASSIC STEEL OVAL S/G Liberty Mountain Sometimes weight is not an issue. Teaching students to climb on top rope, ropes courses and industrial applications are some examples. What you get in exchange for the added weight is longevity under heavy use. * Auto Lock - Weight: 169 grams, Strength: 25kN * Oval Plain - Weight: 145 grams, Strength: 23kN * Oval Screwgate - Weight: 172 grams Strength: 23kN