Bought from Home Despot, it's probably an MTD, the conglomerate which builds machines labeled and sold under various names.
Go to MTD's website:
BUYMTDONLINE.COM - MTD Genuine Factory Parts, accessories and attachments for all MTD brands including Troy-Bilt, Yard-Man, Yard Machines, Bolens, White Outdoor, McCulloch, Huskee and Arnold and using your model and serial number, you should be able to locate an exploded diagram which will identify the shear pin or other frangible part which requires replacement.
If you have no local outdoor power equipment dealer, then whip out your plastic and order online.