Pull open the rubber seals on airtight clip-top preserve jars with one twist. Simply feed the lip of the seal through the groove in the key, wrap, pull and pop! The seal is broken and the lid can be unclipped. An extremely nifty gadget for all home preserves. Works on all kinds of preserve jars which have clip tops and rubber seals with an in-built lip (which is most seals).
Measurements: 5cm long x 4cm wide