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COBRA® adjustable stop countersink bit

Wood bit + Countersink with 5 cutting edges

Simple and fast
Wood and WPC deck boards
All you need to know
  • Wood drill + Chamfering cutter with 5 blades
  • Height-adjustable drill bit with allen key
  • Compatible with Cobra screws M5x50 mm and M5x60 mm


Type of milling bit
For wood
Allen key supplied
0,04 kg
4 x 11 x 25-40 mm
Compatible decking
Hardwood, thermo-modified and composite woods
Hardwood and softwood structure
Compatible screws
Cobra M5x50 mm and M5x60 mm
Number of bits
Stop height
Adjustable with Allen key

Dimensions of the COBRA® drill bit

The drill bit with adjustable stop can be used to pre-drill 4 mm diameter holes to fix 5 or 6 mm diameter stainless steel screws.

The height of the stop on the drill bit can be adjusted using an Allen key (supplied).

The stop has 5 cutting edges to provide an 8 to 10 mm chamfer for the screw head. This fixing tool avoids splitting the deck boards and ensures a perfectly smooth surface, without any risk when walking on the deck in bare feet.

Technical documents

  • Product sheet- Cobra step drill.pdf
  • COBRA-CATA2021-GB.pdf

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