Counterbore pilots offer the alignment needed when counterboring. These pieces are the tip of counterbores providing flexible sizing when having a variety of hole diameters. They have the flexibility to fit on any kind that isn’t specific to any size or for sizes including 1/8”, 1/4”, 5/32”, 3/16”, and 7/13”. All pilots have a shank of 3/32”. Shop at Jantz Supply for all your knifemaking needs.