Triangular trapeze rings are flat on the bottom for an easier hand hold. They are made of a strong aluminum alloy and highly polished for a lasting shine. Now with wider grip handle to meet ASTM standards. The inside diameter is 4 12/” and the bottom grip is 1″ in diameter. The hole for the S-hook is 1/2″. You can use the H140 – H150 – H165 – H172 with this. Tensile strength is 2800 lbs. Price is per ring.