Hakkin A Pack Of 7 Countersink Drill Bit Set Woodworking Tools 5-10# and 12#

• 7 Pcs set includes bits for drilling pilot holes for screw sizes 5#,6#,7# ,8#.9#,10# and 12#.
• Drill And Countersink In One Operation.
• Drill Can Be Adjusted To The Desired Drilling Depth.
• Twist screws on the same axis, and screw nut below the board plane, drill collars can adjust up and down.
• Apply to with a clamp or joint drilling machine, suitable for drilling in the hard wood and wood floor, machine screw for wood screw.

Specifications

Material: HSS Drill 4241
Black chamfer drill body material: steel 45
Dimension:

5#   16mm(W)  x 82mm(L)
6#   15mm(W)  x 80mm(L)
7#   12mm(W)  x 86mm(L)
8#   16mm(W)  x 87mm(L)
9#   15mm(W)  x 91mm(L)
10# 17mm(W)  x 93mm(L)
12# 16mm(W)  x 100mm(L)
Shank: 2.5mm dia hex shank.

  The corresponding bit size Chamfer size
5#  1/8″(3.18mm)  9.5mm
6#  9/64″(3.58mm)  9.5mm
7#  5/32″(3.97mm)   9.5mm
8#  11/64″(4.37mm)   9.5mm
9#  3/16″(4.76mm)   9.5mm
10#  13/64″(5.15mm)   12.5mm
12#  7/32″(5.56mm)   12.5mm
   Package include

  7 x Countersink Drill Bits
  1 x Hex Shank