This torque wrench has a measurement accuracy of ±3%, meeting ISO standards: accuracy is within ±4% and meets DIN-ISO-6789 (international standard), as well as the accuracy standards required by GB/T15729 and ASME B1107.14. With a 72-tooth and 5° feed angle design, this torque wrench can be used even in tight spaces. 【Chrome Molybdenum Steel Material, Left and Right Rotation, Quick Attachment/Detachment】 Made of chrome molybdenum steel, durability is improved. This 6.35mm drive torque wrench supports both right and left rotation. By pressing the button, you can quickly attach and detach sockets. 【Easy-to-Use Torque Wrench, Wide Range of Applications】 First, lift the locking ring to unlock. Next, turn the grip to set the torque value using the main and sub scales. Then, lower the locking ring to fix the torque value. When the set torque value is reached, a light "click" sound will notify you. It is small, lightweight, and comes with a storage case, making it suitable as a portable torque wrench. It can be used not only as a bicycle torque wrench but also for tightening car spark plugs and is useful for motorcycle repairs. 【Non-Slip and Dustproof, After-Sales Service】 The non-slip handle provides a comfortable grip, and the dustproof design helps keep crevices clean. Although it is an unused item, there are some scratches on the case due to storage. Please ask if you have any questions.