Carbide Teeth technology for 50X* longer life in extreme multi-material cutting applications

you can't go past the "Promax BL7"

With SafeBlade technology

Features: Ergonomic body design

#12 Smart Bit Flat Head Tool PSBG12 BDA147D by Starborn Zippered Case Carbide Teeth technology for 50X*Pre drilling & Countersinking Tool Suitable for Timber decking and general woodworking Specifications: Tool Size: 12 g (5. 50 mm) Screw Head Style: Standard He Drill Bit Diameter: 4. 00 mm (5 32") Countersink Diameter: 11 mm Countersink Angle: 82 deg Overall Hole Dept: 40 mm (including countersink portion) Adjustable Dept: No No. of pieces in pack: Smart Bit Tool, 2 replacement drill bits & Allen key