The Vernier Adjustable Locking Control Cable Replacement Head from Buyers Products is a cost-effective way to keep your Buyers Products Vernier Adjustable Locking Control Cable working reliably and smoothly. The replacement head's dual-lock balls provide smooth operation and increased load range, and also extend plunger life. The O-ring sealed plunger assembly adds extra reinforcement for all exterior applications. The adjustable friction collet assures stable settings during extreme vibrations.