Fuller Type "B" Counterbore Sets are designed to cut clean holes in softwood. Can also be used with stop collars to control depth of cut. Counterbores for the flat under the head of nails, spikes and bolts to sink the heads under the surface or deep enough for wood plug to cover the head. Can be set at any point on twist drill and held fast with two hex-socket set screws. Designed for clean cutting and hardened for long life. This set includes the following sizes:
Cutting Diameter Drill Size
See the drop-down menu for different drill bit points and lengths and stop collars.
N - Number in Set
Can be used in Drill Press, Electric Hand Drill or Bit Brace.
Technical InfoW.L. Fuller Inc. is a family owned, third generation, manufacturer of the best countersinks, counterbores, plug cutters, taper point drills, brad-point drills, and step drills. They have over 60 years of experience in manufacturing tools to cut woods, plastics, and metals.