This Easy Grip Knob Turner has a simple yet effective design that helps the user to grip items such as bottle tops, medicine bottles and small door knobs.A good grip enables those with low grip strength or arthritic hands to turn knobs or open items such as bottles. The Easy Grip Knob Turner is crafted from high quality rubber and features a ridged inner surface that grips even smooth surfaces. This allows the user to turn knobs much more easily. This makes it ideal for those who struggle to turn knobs and other objects. The Easy Grip Knob Turner will work on knobs with a maximum diameter of 35mm (1.4\").