Stanley HP28B02 Dual Hydraulic Power Unit (Two 5 to 8 GPM Circuits) Underwater Cut Off Saw It combines the ultra corrosion resistant qualities Connection:w Brass Male QD It combines the ultra corrosion resistant qualities of H 2® blade steel with the refined ergonomics and four position pocket clip of the best in class Endura 4 Lightweight This chisel is 14" with a 3" blade and has a 1" x 4 1 4" hex shank that can ONLY be used in the BR45 For the first time running two hydraulic tools at full 8 gpm capacity is a reality The HP28 (TWIN8) twin circuit hydraulic power unit offers a revolutionary design capable of operating two tools at 8 gpm simultaneously