Attack Your Work Quickly and Safely

For those of you who spend your days ripping boxes and making things happen, we made this for you.

The only knife with an active safety mechanism, ergonomic design and it actually WORKS!

• Ergonomic Design – Fits the natural curvature of your hand using the whole hand to prevent grip fatigue.
• Integrated Movable Guard Release – No more buttons to hold down while you cut.
• In its Natural State the Piranha Wants to be Safe – It’s not until the box is introduced that the Piranha will show its teeth.
• Works with the Natural Body Flow of Cutting –  All while still protecting your hand and body.

States of the Piranha

• At Rest – The movable blade guard is locked over the blade
• Prior to Attack – Box pushes the button down releasing the lock on the cover
• On Attack – As the knife is pulled along the box, the movable guard rotates out of the way exposing the blade.
• During Attack – Once the blade starts cutting the movable guard is held in position by the box and the lock is held in the open position until it is removed from the box.
• After Attack – Eventually the teeth will get dull.  Luckily there is a handy storage bay for 5 spare blades!

Ordering in bulk?  We offer bulk discounts.  Just indicate the number of items needed and the discounted rate will calculate. 

Want to see the Cardboard Piranha in action.  Scroll down to view usage videos.

Delivery Fees

If your address is outside of Louisville, shipping fees will automatically be calculated in your cart.  For our customers within Louisville, we can schedule a pickup time.