Clamps Clips & Fasteners

these worm gear clamps. Other names for the worm gear hose clamp include worm drive clamp, worm gear clips, clamps, band clamps, hose clips, 

A clamp is a Clip used to hold or secure objects tightly together to prevent movement or separation through the application of inward pressure

In the UK the term cramp is often used instead when the tool is for temporary use for positioning components during construction and woodworking; thus a G clamp or a sash cramp but a wheel clamp or a surgical clamp.