Ample QuantityThis set includes 20 sets of high-quality snowblower shear pins and cotter pins, providing a reliable parts replacement option for your snow blower, enough for your daily use and replacement in winter. Whether you are a personal user or a commercial user, this set will meet your needs. Protecting the Snow BlowerThe shear pin protects other parts of the snow blower from damage by withstanding the force of impact when the snow blower hits a large piece of ice or rock. The cotter pin is used to hold the blade and frame in place. In summary, shear pins and cotter pins play an important role in the operation of a snow blower by protecting the machine and holding the blade in place. Applicable ModelsOur cotter pin and shear pin kits models 738-04124 and 714-04040, are compatible with MTD, , Cub Cadet, and Troy Bilt snow blowers. It is also compatible with most yard machines, and lawn tractors. It is recommended that you consult your machine's owner's manual to selec