These are 304 stainless steel, one ear pinch clamps that provide a uniform, 360°, leak free compression - as opposed to gear clamps or other pinch clamps which may develop leak paths. The 'stepless feature' is an overlapping design inner band that creates a consistent seal when tightened with pincer pliers (no spot welds or screw mechanism). Commonly seen in beverage systems, automotive, marine, pneumatic, agricultural, and a range of fluid applications. They are available with a 5mm wide band (-505) or 7mm (-706).