A specialized tap is utilized to cut .255-60 threads in a 1911 frame for repair using oversize bushings. Custom-ground by Challis Grips, this tap reams the hole to the appropriate size before cutting the threads, eliminating the need for pre-drilling. The close-up photograph illustrates the custom reamer grind. To our knowledge, no other oversize bushing tap is ground in this manner; others necessitate pre-drilling to 0.234 inches before tapping the hole.

• Facilitates the cutting of oversized threads in a damaged frame, whether composed of steel or aluminum alloy
• Pre-drilling is unnecessary before initiating the tapping process