Things you might find in a kitchen.
A can opener, or tin opener, is a device used to open cans of food. There are many different styles of can opener, including a simple blade, a small blade and a handle you can turn around, two wheels and a handle to turn them around, and an electric machine that does all the work for you.
The first bladed can openers were invented in the 1850s. Single wheel design can openers were invented in 1870 but the two wheeled model - one sharp wheel, one serrated wheel to hold the can - was only invented in 1925.