This DeWalt Extreme Impact Rated Flat Wood Drill Bit Set includes nine essential sizes: 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, and 32mm. Designed for fast and accurate drilling, these bits feature a bevelled pilot point tip and outer cutting edges for precise positioning and clean holes, even when drilling through wood with nails. The impact driver ready, quick connect 1/4" steel shank ensures durability and slip-proof clamping. The set comes complete in a TSTAK compatible medium tough case, which allows for secure stacking and locking with other TSTAK units for organized storage. Ideal for various applications including door locks, mortising, and electrical or plumbing work in natural hardwood, softwood, chipboard, and other man-made materials.