Sutekkaru is an eating utensil made by forming a high-hardness protective coating on the surface of cast aluminum by thermally spraying a metal harder than aluminum such as iron. Sutekkaru is especially suitable for use as a steak plate.

The combination of a surface as hard as iron and a base made of cast aluminum means that this product weighs 40 percent less than a cast iron utensil of the same size while boasting heat retention characteristics comparable to that of iron utensils.

Moreover, if the meat on the plate is cut with a knife, the thermal-sprayed metal coating prevents the aluminum casting from dented or scratched.

With this product, the hardness and heat resistance of a cast iron utensil can be achieved with 40 percent less weight, which enables easier handling and cleaning. The materials and manufacturing method of the product also combine to prevent rusting and peeling.

In addition, we can produce original design versions of Sutekkaru to meet individual customer needs.

This invention was born out of the attention focused on a crescent gap formed when a bolt is inserted into a round hole, in which a supporting point can be provided to stop the bolt from rotating.

The idea is to provide a supporting point in a crescent gap to prevent bolt rotation when a nut is tightened, thereby securing the bolt or enabling the removal of the nut from a rusty bolt.

A supporting point is also provided to prevent the tightened nut from loosening.

Specifically, a washer with a protrusion that fits into the crescent gap is used. A mechanism to lock the washer with the head of a bolt stops the bolt from rotating together with the nut.

In addition, using a washer with a protrusion paired with a washer that rotates with a nut in order to secure the nut prevents loosening of the nut.This invention has been patented in Japan and in seven other countries. We are currently looking for companies that can cooperate with us in prototyping and commercialization of this product.