Normal Inch: 1-3/4''

Fit standard Straight Shank Countersink mount drilling machines, such as Besana, Schiatti, Bavelloni, Top Drill, Forvet, Bottero, CRL and others. They are also available for machines that require 3/8” straight shank such as Glassline, and tripod drills. Our core drills produce minimal chipping, are free cutting and have exceptional long life.