Blades are constructed of SANDVIK 12C27 Stainless Steel with a hardness of 58-59 HRC (Rockwell C). The combination of the high-carbon stainless steel, and the JERO hardening process, allows a blade to be created that is strong, durable, and offers longer edge life. SANDVIK steel has been used for generations by top knife manufacturers for use in harsh commercial environments. Handles are constructed of a proprietary super polymer that offers a low water absorption rate, and higher fat and protein shedding properties. The JERO Pro4 grip is impact and temperature resistant and is formed on the blade and tang of the knife, using injection molding techniques to create a strong handle that delivers great performance and feedback. The ergonomic design is comfortable for all-day use while providing increased control at various different hand positions. The grip is lighted textured using a unique, and JERO developed process of creating a handle surface that performs well wet or dry and attaches to both cloth and rubber or nitrile gloves used in meat and foodservice industries. The handle took years to develop with the help of testing at meat processing facilities, both large and small. The JERO Pro4 is the 4th generation of knives from the JERO Pro Series of knives. The Pro4 represents years of research and development, and years of testing to create a new line of knives that utilize modern design and manufacturing techniques, using the most modern materials. JERO has always been at the forefront of product development, leading the way for future knife manufacturing. The Pro4 line continues with the JERO tradition of being an innovator. The JERO Pro4 Series comes with a lifetime warranty against defects in materials and workmanship when the knives are used as designed and exclude misuse, abuse, or normal wear. Made in Portugal by proud JERO employees.