An avocado slicer is a tool for making uniform avocado wedges without squishing the avocado flesh. The slices can be used for sandwiches or salads.
They are designed to, in one motion, turn one-half an avocado into slices, and scoop the slices up at the same time as they are cutting.
Most are about 17 1/2 cm (7 inches) long. Some have their cutting parts made of stainless, and handles made of plastic; others are made completely of nylon plastic. The cutting part is a somewhat circular or oval band, with spokes through it. Nylon ones may have spokes coming only part-way into the centre cutting part.
To use, you slice a ripe avocado in half lengthwise, and remove and discard the pit. You then hold the avocado skin-side down in the palm of your hand, broad end away from you. Starting at that end, you insert the slicer (squeezing it at the sides to make it more narrow if necessary for the particular avocado you have), and pull down and towards you. You can use a spoon to scoop out any pulp that might be left behind in indents in the shell, etc.
An avocado slicer can also be used for fruit such as kiwi and mangoes.
Some people have success using an avocado slicer; others feel they have more success sticking with a knife to make their slices.