Features: Quick preload adjustment by turning, not tapping! Simply by replacing the stock locknut and spring seat, the difficult preload adjustment is made easier. Instead of the locknut method, the band method used by WP and other companies The lock nut can be locked and unlocked with a 5mm hex wrench. No need to repeatedly tap in the spring retainer when adjusting the preload, Easily to adjust by simply turning the spring part by hand even when it is attached to the bike body.