Spot Hogg Boonie Hard Mount Sight 3 Pin .019 RH Constructed from solid 6061 aluminum;Silent, click-free adjustments;Micro-adjustable 2nd and 3rd axis;Tool-less adjustment;HRD Technology ensures a solid, buzz-free mount;Compatible with all Spot Hogg heads as of 2024;Quick disconnect feature;Available in .010?, .019?, and .029? pin sizes;Pins: Three;Direct mount style