Profile Installation & Removal Tool Use to install & remove Spline drive sprockets, Spline Drive Spiders, & crank arms from the 48 spline spindle of the Profile & Madera 3-Piece Crankset. Gun Drilled Hollow (GDH) axle: Fits Cranks with the GDH BB spindle. M10 x 1.25 Solid Spindle: Fits solid Cr Mo & Ti axles. 3/8 x 24 SAE threads. Buy Profile Installation & Removal Tool from Chain Reaction Cycles, the World’s Largest Online Bike Store.