Not all square taper crank and bottom bracket combinations are compatible. Although nearly all spindles use a 2-degree taper, there are two competing standards, defined by the measurement across the flat at the end of the spindle. The JIS size is used by Shimano and most other Asian manufacturers. The ISO size is primarily used by Campagnolo and other European manufacturers, in addition to cranks that adhere to the NJS standards (Sugino 75). Some manufacturers make cranks and bottom brackets to both specifications.