This 2-inch boring head features a 1-1/2-18 thread and is designed for precise hole sizing with a tool capacity up to 1/2 inch. The maximum offset is 5/8 inch with graduation marks every 0.0005 inch. The bar holder moves freely and smoothly while the standard design provides superior rigidity for chatter-free boring. A micrometer lead screw offers 0.001-inch direct reading accuracy for precise adjustments.