Ears are crimped with a tool to tighten the clamp. Snap close or ratchet clamps are closed and tightened by a snapping or ratcheting mechanism. Tightening can typically be done by hand. Spring ...

These plastic fittings use flat-band/spring- or ring-type clamps that can be really tight and ... Stronger and longer than other brands, this tool works great on flat-band hose clamps found on ...