This is a pack of four optional Lunsford "Quick Tune" Kyosho RB6 Titanium Shock Mounts. Lunsford Quick Tune titanium shock mounts were invented by racers for racers, and are geared towards the hardcore 'tuning' enthusiast. They allow you to quickly move the shock to any shock tower position by simply removing one nut. The quality is the same as all Lunsford parts. Precision CNC machined from domestic 6AL/4V titanium to exact tolerance. These shock mounts have been around since the mid '90s and if you're a diehard tuner, these are must have upgrade.