Isis standards and automatic to tell okutarinku standards, square standards.
This will be the tip of errors, such as the parts with no worry of breakage due to BB.
■ adaptation: ISIS standards, okutarinku standards (from Shimano Octalink) Square Standard BB (square type shaft)
■ Size: Height approx 80 mm
■ Use tools: 8 mm Hex Wrench or 15 mm wrench