Bostitch Twin Blade Knife 10-501;

Twin blade knife, 2 knives in 1, ergonomic handle design for comfort, control & balance for extended use, retractable blades controls cut depth & safely stores in knife when not in use, blade changes with the push of a button, no tools required, swing out blade storage holds up to 9 blades, padded thumb rest for comfort. Patented safety lock allows only 1 blade to be extended at a time, accepts all standard, heavy-duty, & hook blades.