Description Alcon Piston Removal 6 Wrench Set 28.6mm 30.2mm 33.4mm 41.3mm 44.5mm 47.6mm These Piston Removal Wrench Kits are made from 6061-T6 aluminum and finished with a black anodizing.The wrenches fit tightly over the brake caliper pistons for easy removal. Each wrench is laser etched with it’s size. SKU: GT5190.