Shear Pins protect your snow blower from being damaged by obstructions such as ice, rocks and other debris caught in deep snow. These pins are designed to break at a designed load if the auger jams or clogs in order to limit damage to the gear case and impeller. The RYOBI Replacement Shear Pins are compatible with RYOBI 40V 2-Stage Snow blowers RY408150/RY408015 & RY40870/RY40807 and includes (4) bolts and (4) lock nuts.