The Pro BB Wrench gives the selected bottom-bracket profile a long, cushioned grip for controlled installation or removal.
The 6460242 option is Shimano 16x44 and 6460296 is BSA30/DUB 12x46. The 6460251 and 6460271 options are separate six- and eight-notch applications. Each SKU must match the actual cup or lockring; a broad standard name alone does not determine fit.
