DEWALT XP Diamond 4.5 in Cut off Wheel New Bath A: It is constructed from A: It is constructed from all welded 18 gauge steel with a matte black powder coat finish for durability and rust resistance two 20 Volt batteries Extended performance diamond matrix for long life and enhanced material cutting Segmented rim blades are laser welded with heat treated steel bodies which provides increase durability and long life Large diamond segments with cobalt is ideal for use across various product applications Dry cutting concrete Sub Brand XP Series Name N A Application Cutting Material Diamond Type N A Wheel Type Cut off wheel Grit N A Diameter (Inches) 4