All ring core drills are available with a straight shank or attached to a brass nut with standard 5/8″ -11, 3/4″-16, 1/2″-12, 2 1/2″-16 or 16mm x 2.0 female treads. Standard cutting depth is 4″. Special lengths are available upon request. Some special diameters may be available upon request. All drill cores in good condition may be retipped for new tool performance at a reduced price.
Note: Sizes are nominal shank sizes.  Holes will be drilled slightly large.