[Quick-Adjust Countersink Depth by Hand] - Set the perfect countersink depth in seconds without any tools. Simply rotate the scale plate for instant adjustment, making your workflow faster and more convenient than traditional wrench-based designs. [Auto-Stop Aluminum Collar with Bearing] - The built-in bearing activates an instant stop upon contact with the wood surface. This prevents over-drilling and tear-out, ensuring clean holes and protecting both your workpiece and the drill bit from excessive wear. [Precision Depth Control for Pilot Holes] - For the pilot hole depth, use the included wrench to precisely set the desired drilling depth (up to 1.3"). Drilling vertically and minimizing wobble helps extend the life of your drill bit. [6-Piece All-in-One Professional Set] - Get a complete workshop solution with 5 durable HSS M2 tapered bits (sizes: 1/8"x3/8", 9/64"x3/8", 5/32"x3/8", 11/64"x1/2", 3/16"x1/2") plus a dedicated adjustment wrench. [Versatile Woodworking Solution] - Ideal for a wide range of applications including furniture assembly, cabinet installation, DIY projects, and deck building. Engineered for use with various materials such as solid wood, plywood, MDF, and particleboard. Color: As Shown Material: Metal Package Contents: 1*Quick-Adjust Countersink Drill Bit Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.