This is a six-piece, 152mm DeWalt DT90238 kit. It is ideal for situations requiring wood drilling with holes up to 100 mm deep. Quick Change Shank: prevents spinning by fitting 1/4" (6.35mm) hex bit adapters and standard quick-change extensions. Features Clear lid: This is for quick and easy bit selection. Inner dovetail system: bit bars and accessories can be moved around and customised to your preference. Impact ready: for use in impact drivers with high torque demands. Quick change shank: fits standard quick-change extensions and 1/4" (6.35mm) hex bit adapters, preventing spinning in the chuck. Tri-flute tapered design: faster removal of wood chips and less binding. Three cutting edges: 6x faster cutting combined with a tri-flute design for optimum chip removal. Three cutting spurs: for cleaner, faster holes and extended drilling life. Full screw tip: allows the bit to self-feed for ease of use and pull-through. Suitable for wood drilling applications: for holes up to 100mm deep.