The "Blue Worker" continues to evolve further over the 50th anniversary. The Bull Worker XO Hard Type Solid is a very stable product that has been modified by a thorough testing on the working part to enhance its power. For 50 years of producing a brewer and a staff at Fukushima Isei manufacturing facility, who has been very familiar with brewers, and staff incorporating new technologies, each part has been revised with new technology and thoroughly through every detail. By reviewing the sliding resistance, the total length is reduced to 0.8 inches (20 mm) than the X5, and the spring diameter has been changed. The center pipe uses an environmentally friendly electrodeposition coating. Neo-Black is used for the painting color. The logo design has been updated with a powerful expression of the XO letters, and the background uses a dynamic design that emphasizes muscle imagery. By using DVD (sold separately), we have set the price that is easy to purchase.