American Worm drive hose clamps  are widely used in a variety of applications, including heavy machinery, recreational vehicles (ATVs, boats, snowmobiles), and lawn and garden equipment. 3 band widths available: 9/16”, 1/2” (both in stock), 5/8” 301 stainless steel throughout for corrosion resistance (other materials available) 5/16” hex head screw Exceeds SAE requirements  German style worm drive clamps deliver higher clamping force than American style clamps at less torque. That means heavy equipment, recreational vehicles, and lawn and garden equipment can often use one of these 9 mm band width clamps instead of a 1/2” American style clamp at substantial savings. 9 mm and 12 mm (heavy duty) band widths High clamping force Rolled edges minimize hose abrasion Non-slotted band eliminates hose extrusion Best option for performance versus price For optimum performance in critical applications, specify  British style worm-drive hose clamps. These premium clamps are counted on around the world — on land and sea — for their strength, dependability and long service life. 1-piece tubular housing (nonwelded) for maximum strength Smooth I.D. reduces hose damage and maximizes conversion of torque to clamping force Rolled edges protect hose from abrasion All AISI 316 stainless steel (band, housing and screw) for marine applications The choice of major yacht-makers in North America, Europe and Asia2 band widths (10mm,12mm) and a wide range of diameters