This dowel jig is a high - quality tool for woodworking. The splints on both sides are crafted from aircraft - grade aluminum alloy with an anodized surface, and the clamp body is made of heat - treated 45 steel, ensuring high strength and deformation resistance. It features high - precision locating, with holes precisely perpendicular and centered in the block. The clamps hold securely and evenly. The engraved lines with large viewing windows on both sides allow for direct center alignment, making installation and drilling a breeze. With a clamping range of 0.4'' - 6.7'', it can be used on boards of various thicknesses. It comes with 6 steel bushings that enable drilling holes of the same size without moving the jig, and 3 premium twist drill bits made of quenching high - speed steel, which are tough, hard, rust - resistant and not easily broken. It's suitable for multiple applications, perfect for creating different types of joints in woodworking projects like making shelves, cabinets, tables, chairs and mounting railings.