Kraft Tool Bronze Concrete Groover CF319 6 by 6 Inch 3 by 4 Inch Bit 3 by 8 Inch Radius Wood Handle (One Piece Cast Cement Masonry Tool) Saws Restricted Clearance Mechanical Chases: Clamping Restricted Clearance Mechanical Chases: Clamping onto round black iron pipes and threaded couplings at offset approach angles up to 30 degrees where structural framing and adjacent lines block swing arcs Rated for maximum speeds up to 7 this concrete jointing tool utilizes a hand polished base plate and a contoured hardwood handle to form uniform stress relief control joints without gouging wet cement or catching on aggregate 24 cm) Groover Bit Depth 3 4 in