1. Sufficient Quantity: This set of components includes 20 sets of high-quality snow blower shear pins and cotter pins, providing you with a reliable option for parts replacement for your snow blower. It is enough for your daily use and replacement during the winter. Whether you are an individual user or a commercial user, this set of components can meet your needs. 2. Protect the Snow Blower: When the snow blower hits a large piece of ice or a stone, the shear pin protects other parts of the snow blower from damage by withstanding the impact force. The cotter pin is used to fix the blade and the frame. In short, the shear pin and the cotter pin play an important role in the operation of the snow blower, both protecting the machine and fixing the blade. 3. Applicable Models: Our cotter pin and shear pin kit models are 738 - 04124 and 714 - 04040, which are suitable for MTD, Cub Cadet and Troy Bilt snow blowers. It is also compatible with most garden machines and lawn tractors. It is recommended that you refer to the user manual of your machine.