This is a shear pin, sometimes called a shear bolt, is used to connect various elements of the small engine lawn and garden equipment together. In a snowblower, it connects the auger to the shaft. They are designed to break to protect other parts when certain conditions are met, such as when part of the machine contacts a foreign object, such as a large chunk of ice, during operation. The design of shear pins means that they will eventually need to be replaced once they break away. However, shear pins can also suffer from corrosion and other issues. Owners should check their pins for corrosion or other issues. It is a good idea to have at least one or two extra pins on hand. The shear pin is a genuine OEM part that is used for mowers, lawn tractors, and snowblowers. This metal shear pin is sold individually. Compatible brands include Craftsman, Murray, Snapper, Simplicity, and Briggs & Stratton.