Blackworks Racing dress-up washer kits are manufactured from solid 6061-T6 (solutionized and artificially aged), pre-tempered aircraft grade aluminum, utilizing CNC mills and CAD software in the engineering process. All design and manufacturing takes place in house, allowing for tighter tolerances, greater process control, and elimination of defects. Washers are milled and then hard anodized for an indestructible finish that will last a lifetime of abuse. Each kit comes with (5) Machined Washers and (5) Grade 8 Stainless Hex Countersunk Head Bolts. Lastly each washer is laser engraved with a BWR logo ensuring that each piece is a genuine Blackworks Racing component.