Zyliss Strongboy Jar Opener eBay Live Double wall vacuum insulation retains Double wall vacuum insulation retains hot or cold temperatures Durable stainless steel interior and exterior Cool to the touch with hot liquids Kills 100+ mice per set of AA batteries (not included) Quick and effective Clean kill in seconds Semi transparent window for quick and easy kill verification Low battery indicator Safe to use around children and pets it is reliable and long lasting Grips all size jars to remove the lid with minimal effort Flexible clamp with inner rubber grip pad fits small medium or large lids Quick adjustment by turning knob at end of handle All Zyliss Product comes with a 5 Year Guarantee