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Cobra® SMARTBIT pre-drilling and countersinking tool

An effective and precise stop collar

Know everything
  • Compliant with Building Codes - Pre-drilling recommended
  • Uncoupled stop: No marks on the board
  • Ultra-resistant cobalt bits
  • Flush screw
  • Unrivalled precision and finish

Reinforced drill bits

The cobalt in Cobra SMARTBIT® drill bits strengthens them and provides significant longevity. They do not break or bend, even after many uses.

The SMARTBIT® countersinking tool is delivered with three interchangeable bits, which are very easily replaced. A reliable and durable tool.


Ø bit: 3.2mm, 3.6mm, 4mm
Ø screw head: 8 mm, 10 mm and 12 mm
Ø countersink: 6.6 mm, 9.2 mm and 11 mm

Ø screw: 4.5 mm, 5 mm and 6 mm
Drilling depth: 30mm
1 pre-drilling and countersinking tool
2 replacement bits
1 hexagonal torque wrench
Cobalt bits
0.08 to 0.11 kg

Strengths of Cobra® SMARTBIT

Use of a Cobra Smart Bit

Cobra SMARTBIT® countersinks holes and pre-holes for fasteners with unrivalled precision and finish. Equipped with a stop collar, it can be used to drill your deck boards to the nearest millimetre.

Its reinforced cobalt bits drill all types of wood, whatever the density, without ever breaking.
Cobra SMARTBIT® provides considerable time savings in installing your deck, while ensuring professional results.


Cobra® SMARTBIT countersinking bits are offered in bit packs + two interchangeable spare bits.

Three bits to choose from

Cobra SMARTBIT® is available in three sizes with bits that are 4.5 mm, 5 mm or 6 mm in diameter.

Excerpt from Building Codes

Standard technical specifications (STS) Pre-Drilling

  1. a) Pre-Drilling

Pre-drilling the board is mandatory for all fasteners located at the ends of softwood and hardwood boards. Pre-drilling is mandatory in the common part for hardwood boards. When pre-drilling is done, it must correspond to about 0.8 times the outer thread diameter of the screw for double-thread screws, and to the under-head diameter for partial-thread screws.

Technical documents

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