山下工業研究所 List of Products and Services

The "BD042N" is a bit exchangeable lead socket that allows for bit replacement in the event of bit breakage, enabling the main socket body to be used for a longer period. The dedicated bits are designed with specific materials and heat treatment, achieving superior durability compared to commercially available double-ended bits. Additionally, we also offer the powerful Tex setter "BD035N," which has enhanced holding power and can securely grip long-type Tex screws (drill screws). 【Features】 ■ Bit replacement is possible in the event of bit breakage ■ The main socket body can be used for a longer time ■ Dedicated bits that provide superior durability compared to commercially available double-ended bits are available *For more details, please refer to the PDF document or feel free to contact us.

• Socket wrench

The product "14218M" is a set that includes a dual-sided wheel nut socket "14118PM-19X21" and an extension bar "14760ST-B". The socket features a thin design compatible with aftermarket aluminum wheels, and it is also color-coded for size differentiation, allowing for easy size identification at a glance. Additionally, it is equipped with a resin wheel protector on the outer circumference to reduce damage to the wheels. We also offer a long universal socket for electric drills "BD011N" and a repair kit "BDUJRK.L" for BD011N/BD024N-L. 【Features】 ■ One socket compatible with both 19mm and 21mm ■ Socket compatible with aftermarket aluminum wheels ■ A resin stopper attached to the tip of the extension bar prevents scratches on the top of the wheel nut *For more details, please refer to the PDF document or feel free to contact us.

• Socket wrench

The "4711XZ" is a free-turn cross wrench from the Z-EAL series, which enhances the functionality of the popular free-turn cross wrench "4711X." It reduces rotational resistance, allowing for smoother and longer rotations, and is equipped with a center lock mechanism for the handlebar to prevent unexpected shifts of the handlebar. Additionally, we also offer the wheel nut socket "4300PMZ.65" that matches the free-turn cross wrench. 【Features】 ■ Enhanced functionality of the popular free-turn cross wrench "4711X" ■ Reduced rotational resistance for smoother and longer rotations ■ Equipped with a center lock mechanism for the handlebar ■ Prevents unexpected shifts of the handlebar ■ Comes with a dedicated non-woven fabric storage bag *For more details, please refer to the PDF document or feel free to contact us.

• Spanners and wrenches

The "KOKEN Comprehensive Catalog" is published by Yamashita Industrial Research Institute, a manufacturer specializing in socket wrenches. It introduces various products, including the "Z-EAL" series, which features a "Z" designation in its model number, as well as "hand sockets" and "insulated tools." Socket wrenches are incomplete tools that cannot perform tasks on their own; however, by using them in conjunction with sockets that engage with bolts, driving handles, and other attachments, they allow for an almost infinite combination of uses. They transform into versatile tools that can flexibly adapt to various tasks. [Contents (partial)] ■ Relentless pursuit of socket wrenches ■ Technical Features of Ko-ken Tools ■ Company Overview ■ Registered Trademarks ■ Z-EAL *For more details, please refer to the PDF document or feel free to contact us.

• Socket wrench
• Other work tools
• Tool Sets

The "Z-EAL Series" is a socket wrench that achieves excellent usability by thoroughly implementing precision management at a higher level, free from conventional standards. The standard sockets are shorter and thinner, while the ratchet handles have smaller heads and finer gears, infusing all products with our concept of "Mechanic Standard." Additionally, we achieve excellent usability by thoroughly implementing precision management at a higher level, free from conventional standards. 【Features】 ■ Practical specification settings ■ Improved precision at joints (reduction of play) ■ Adoption of a new shape ball dimple ■ New structure 36-tooth gear ratchet handle *For more details, please download the PDF or feel free to contact us.

• Socket wrench