WL Fuller Four-Flute Type "B" Counterbore

3 reviews
Regular price $ 20.26 Sale

Made in the USA  ·  W.L. Fuller

  • Made of carbon steel & hardened for long tool life
  • For use in soft woods & plastics
  • Four flutes for clean & accurate boring
  • Two hex-socket set screws in counterbore
Customer Reviews
5.0 Based on 3 Reviews
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MH
11/07/2019
Michael H.
United States United States
Quick order processing and arrived as described!

These cutters are great for the price.

GS
11/03/2019
Graeme S.
Australia Australia
Great hardware supplier

Fast, friendly service.

LM
10/06/2019
Lois M.
United States United States
WL Fuller B6 Counterbores

My production manager loved how these counterbores worked, said it saved him time and we all know time is money :-) He liked them so much we've now ordered them twice! Paul was quick to respond and fill our orders SAME DAY!


  • A high quality American-made counterbore made by WL Fuller. Made of carbon steel & hardened, this counterbore is very well-built, durable, & cuts clean holes in soft woods & plastics. These type “B” counterbores are for the flat under the head of nails, spikes, & bolts to sink the heads under the surface, or deep enough for wood plug to cover the head. The counterbore is held in place with two hex-socket set screws fastened into the bit & is easily adjustable up & down the length of the drill bit if the need arises, they also can be used with stop collars to control the depth of cut, See here for our Stop Collars. May be used in a drill press, electric hand drill, or bit brace.  A very popular item with our customers.  Made in the USA.

       The W.L. Fuller Co. is a family owned, third generation manufacturer of the best countersinks, counterbores, plug cutters, taper point drills, brad point drills, & step drills. All made 100% in the U.S.A. today. With over 60 years experience manufacturing tools to cut woods, plastics, & metals, Fuller provides tools you need to get the job done while saving you time & money. All of their products carry their “satisfaction guarantee”.


  • Model
    Cutting Diameter
    Drill Hole Size
    Overall Length
    #B3
    5/8"
    3/16" 1"
    #B37 5/8" 7/32" 1"
    #B34 5/8" 1/4" 1"
    #B317 5/8" 17/64" 1"
    #B39 5/8" 9/32" 1"
    #B310 5/8" 5/16" 1-1/8"
    #B43 3/4" 3/16" 1"
    #B47 3/4" 7/32" 1"
    #B4 3/4" 1/4" 1"
    #B49 3/4" 9/32" 1"
    #B5 3/4" 5/16" 1-1/8"
    #B511 3/4" 11/32" 1-1/8"
    #B56 3/4" 3/8" 1-1/4"
    #B64 7/8" 1/4" 1-1/8"
    #B610 7/8" 5/16" 1-1/8"
    #B6 7/8" 3/8" 1-1/4"
    #B67 7/8" 7/16" 1-3/8"
    #B68 7/8" 1/2" 1-1/2"
    #B74 1" 1/4" 1-1/8"
    #B75 1" 5/16" 1-1/8"
    #B76 1" 3/8" 1-1/4"
    #B7 1" 7/16" 1-3/8"
    #B78 1" 1/2" 1-1/2"
    #B85 1-1/8" 5/16" 1-1/8"
    #B86 1-1/8 3/8" 1-1/4"
    #B87 1-1/8" 7/16" 1-3/8"
    #B8 1-1/8" 1/2" 1-1/2"
    #B89 1-1/8" 9/16" 1-5/8"
    #B96 1-1/4" 3/8" 1-1/4"
    #B97 1-1/4" 7/16" 1-3/8"
    #B98 1-1/4" 1/2" 1-1/2"
    #B9 1-1/4" 9/16" 1-5/8"
    #B910 1-1/4" 5/8" 2"
    #B912 1-1/4" 3/4"
    2-1/4"
    #B106 1-3/8" 3/8"
    1-3/8"
    #B107 1-3/8" 7/16"
    1-3/8"
    #B108 1-3/8" 1/2"
    1-1/2"
    #B109 1-3/8" 9/16"
    1-5/8"
    #B10 1-3/8" 5/8"
    2"
    #B1012 1-3/8" 3/4"
    2-1/4"
    #B126 1-1/2" 3/8"
    1-1/2"
    #B127 1-1/2" 7/16"
    1-1/2"
    #B128 1-1/2" 1/2"
    1-1/2"
    #B129 1-1/2" 9/16"
    1-5/8"
    #B1210 1-1/2" 5/8"
    2"
    #B12 1-1/2" 3/4"
    2-1/4"
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