White knuckle may be missing. A portion of meat must be attached to bone.
YELLOW - Shows the maximum tolerance zone. Cuts anywhere within the tolerance zone will result in an acceptable part separation provided the flesh is not mutilated and the meat yield associated with the part is not materially affected.
NOTE - A cut made outside the tolerance zone exposing bone shaft (medullary cavity) is not acceptable as U.S. Grade A. Miscut product is downgraded to U.S. Grade C.
TIP - A good visible guide to let you know you've cut through the acceptable tolerance zone is a portion of the condyle (white cap or knuckle) remains on the part.
Hock Cut - Tendons connecting flesh to the tibiotarsus must remain attached to be acceptable as U.S. Grade A.