The listing, P-51 (P-38s big brother) has ended.
The P-51 is the larger version of the P-38 used by mess hall cooks to open the big trays and large cans of chow. Easier to use than the smaller P-38 the P-51 is a full 2" long, the added length affords better leverage and doesn't require as much thumb pressure to use. They are especially good for smaller or arthritic hands (like mine). I prefer them over the P-38s because a P-51 will open cans much easier and faster and will last much longer than the P-38.