Description: Depth AdjustableDrilling and countersinking depths are adjustable with hexagonal threaded screws and depth control stop, providing maximum versatility for a variety of applicationsWide ApplicationOur countersink drill are widely applicable to natural wood, man-made boards, MDF, particle boards, plywood, aluminum, non ferrous materials, decorative materials and so onMaterialCountersink Bits are made of alloy with high hardness, sharp and wear resistant, fast chip removal, and can be used for a long timeFunctionTaper bits are practical tool specially used for drill holes in wooden boards. It can drill holes quickly and has adjustable length. It is suitable for softwood, hardwood and all kinds of woodWoodworking BitsEasy to use, drill holes accurately and effortlessly.Adjustable Bits, Professional manufacturing, stable performance, and long service life Specification: Material: Alloy Size Chart: 8cm/3.15inch Package Includes: 1 Countersink Bit Set Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.