The BreaKO Reduction System will fit the draw bolt hole of some guns. If a hole must be drilled, it should be 7/8" diameter, 1/8" deeper than the reducer is long. To be effective, the unit must fit tight in the stock. By wrapping tape around both ends of the reducer it can be made to fit tight in oversize holes. If the hole is excessively tight, remove the label. Insert the reducer into the stock with the threaded hole toward the butt plate and seat firmly. Plain end points to muzzle. End with threaded hole faces butt plate. The reducer may be removed by inserting a 1/4-20 bolt into the threaded hole and pulling.