The photo shows a resin-made tool set consisting of four double-ended wrenches.
Each wrench features a different jaw size, and the set includes a stacking function that allows the four tools to be combined for compact storage and ease of handling. All four wrenches are molded from the same composite resin formulation, ensuring consistent strength and performance.

This product is commercially available as the “CARBLACK Double Wrench Set.”

At Shinshu Yoshino Electric, we have developed a proprietary composite molding technology known as the Direct Fiber Feeding Injection Molding Method. By modifying the injection molding machine, continuous fibers are fed directly into the process, enabling the manufacture of high-performance CFRTP components.
Material
Resin: PA-based resin
Reinforcement: Carbon fiber

Based on our expertise in the design and manufacture of press dies and engineering plastic molds, we provide fully integrated, in-house production—from terminal press processing to insert molding—within a single facility.

IATF 16949 Certified
The same rigorous quality management standards applied to automotive components are also implemented across all non-automotive products.
For stable, high-volume production of advanced composite components for the information equipment and industrial tool markets, trust your requirements to us.

~ Technology is Beautiful ~ Shinshu Yoshino Electric Co., Ltd.