Jagged Nail (JNail)
The humble nail has been in use for probably thousands of years and its design has remain more or less the same.
Nails or screws used to fasten wood will loosen after some time especially when they are being constantly shaken or moved, shortening the lifespan of furniture or building, and may even cause fatal accidents.
My invention, JNail, has hook shaped gaps built in as shown in the diagram.
Wood will expand to fill the gaps in JNail thereby providing a firm grip and prevent it from getting loose. Furniture, pallet or building using Hooked Nail will be stronger and last much longer than traditional nail or screw.
Someday all nails or woods screw will be made this way.