Unlike other recoil reducers, the Counter Coil is a true adjustable hydraulic shock absorbing unit. The hydraulic cylinder compresses, absorbing the shock of recoil and decelerates the rearward thrust of the firearm. What this means to the shooter is less recoil is felt. The cylinder is single acting, which means the shooter can adjust the compression stroke for a 12 gauge shotgun or a .458 Winchester magnum, and their return rate is unaffected. With the wrench provided, the adjustments can be made in the field in less than 10 seconds. Adjustments are made by turning the cylinder rod with your fingers. There are 3-5 revolutions of adjustments available. When the unit is adjusted to the most comfortable setting, further adjustments are not necessary.