Established in 1989, Works Connection continues to produce quality products for all your moto needs. Allows no tools tuning to obtain crisp, clean, positive off-idle throttle response. CNC-machined from durable 7075 T-7 billet aluminum. EZ Dial knob with laser-etched numerals. O-ring design helps resist engine vibration and increase accuracy and longevity. Includes sealing O-ring, tension spring and washer.