Jar and bottle holder - hook the clamp over the edge of a work top and then place the jar or bottle you require into the V shaped notch. The holder uses a ram device pushed by your stomach or hip to hold whatever you want to open firmly in place. You can then use one hand or both hands to twist the top. To ensure superior grip when in use both the ram and clamp body have a rubber lining and the jar holder is made from strong moulded plastic, featuring non-slip feet for optimum user safety. Suitable for jars and bottles up to 120mm (4.75") in diameter.