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Pre-drilling & Countersinking Tool for decking

Pre-drilling & Countersinking Tool for decking

Regular price $25.95
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Starborn Smart Bit is the best tool to get your screws countersunk perfectly

Learn the Smart-Bit

The Smart-Bit® Pre-drilling and Countersinking Tool is designed for decking and general woodworking. The tool features a pre-set countersink, a free spinning stop collar to protect the work surface, and replaceable Powerbolic® fluted drill bits that cut through decking more than twice as fast as standard wood bits.

The countersink profiles of Smart-Bit tools are precisely matched to Flat Head Stainless screws. For materials that require pre-drilling, especially hardwoods, this product combination makes it easy to achieve a clean and professional finish.


  • General Use

    The hole is complete when the collar stops spinning. To clean the debris cavity, hold the free-spinning stop collar in one hand and run the drill away from the work surface. The waste material will simply eject itself.

  • Extending the Life of the Drill Bit

    To extend the life of the drill bit, drill in a straight and stable fashion. Two-handed operation is highly recommended. Drilling into ipe or similarly dense materials can be hard work. Rest as needed and don't sacrifice stability for speed!

Product Features

Free-Spinning Stop Collar with O-ring.

The Smart-Bit stop collar spins free of the drill bit, preventing marring or burnishing of the deck surface. When the stop collar stops spinning, the hole is complete.

Anti-Clog Debris Cavity.

The Smart-Bit debris cavity gathers waste material, keeping it clear of the countersink, unlike conventional flush mounted countersinks. The waste simply falls out onto the deck surface after each hole is completed.

Powerbolic® High-Speed Drill Bit.

The Powerbolic® bit has specially designed fluting that cuts through decking more than twice as fast as standard wood bits.

Replaceable Bit.

Smart-Bit® tools come with two extra Replacement Bits and a 3/32” hex wrench for use with the set screw that holds the drill bits in place. Replacement Bits are also sold separately.

Pre-set Shaft Length.

Together with the countersink, the overall hole depth for the #10 Flat sizes is 1-1/8” deep, designed for use with lumber up to 5/4” (nominal).