Large 3-d type valve seat cutter ball head 1drive ball all stainless steel!! This comes with ball body-2004 tool bit holder carbide 3 angel cutter notice there are four 1/4 set screws that hold the tool bit holder. This will cut 2.200″ to 3.200″ this ball head takes the larger type of tool bit holder. 750 wide all standard carbide cutters fit this tool.