Specifications: Unit of Measurement: Pack. Handle: Hexagon 1/4" HEX Set: YES Set of 5 Wood Drill Bits Blue Groove 6x: 16/18/20/22/25mm + Extension 1. CUTTING CUTTERS Drill even holes with minimal chance of breaking wood. 2. SPIRAL REMOTE Control Easy to use the drill bit and drill through wood effectively. 3. CONICAL SPIRAL Less chance of the drill bit getting stuck and easy to use. Triple spiral for faster chip evacuation. 4. HARDENED ALONG THE ENTIRE LENGTH Longer durability. 5. COMPACT LENGTH Fits between struts in most applications. **