For use on fabric, leather, vinyl, and more. Available in two size: line 24 and line 20. Line 24 has a post size of 5/16 in. for 8 oz. to 10 oz. leather. Snap top is 9/16 in. in diameter. Line 20 has a post size of in. for 5 oz. to 7 oz. leather. Snap top is 7/16 in. in diameter.