School backpacks with clasp
prices on 2 models
— quick-release fastener — usually mechanical, with a loop and a tongue that is fixed in the loop by a flat spring-loaded button (although other design options, such as a magnet, are also found). A characteristic feature of any fastener (and its difference from the "lightning") is that it secures the parts to be connected only at one point, and not along the entire line of contact. Usually backpacks/bags/packs with such a lock have a flap that covers the main compartment and is fixed with one or two fasteners.