CRITERION INDEXABLE ADJUSTABLE BORING HEAD 0.75 1″ I.D. VINTAGE USA MADE CNC por | ago 4, 2026YOU ARE PURCHASING THE PICTURED BORING HEAD. HOLDS 1″ BORING BAR. Thread Gages. Top Quality Products. LOCATION: 11-2-E-5. Top Quality. We pride ourselves in prompt and accurate service to make sure your order arrives when you need it to.