Manual Head Holder - Hi-HogCalm your livestock with Hi Hog's head holder. You can work with confidence with Hi Hog's secure hydraulic lock. Better by design smooth, effortless operation secure hydraulic lock (does not require a hydraulic pump) can lock in both the closed and open position no springs or friction lock points to wear out or slip during use curved head yoke and cradle provide superior head control without reducing animal access grease fittings on all primary pivot