Product review (1 stars): There are better options
These hose clamps are an overpriced and inferior substitute for stainless steel worm-drive hose clamps. They are thin, plated steel and the bent flanges where the bolts go have sharp corners that can nick the installer's fingers. They have a very limited adjustment range compared to worm-drive clamps. If you need to fully open them (because you have already taped the vent hose to its connectors) the bolts are more difficult to re-engage in their flanges than worm-drive clamps. Suitable SS hose clamps can be found in big-box hardware stores (at a lower cost than these), automotive stores, and on-line here. It's helpful to be able to put your hands on them to be sure they will fit your application. Most hose clamps have a hex-head bolt with a straight slot that is much easier to tighten with a socket wrench than with a screwdriver. Some have only a straight slot head and should be avoided.