This 8mm shank router bit is made of b carbide material, it has high strength, high hardness, wears resistance, and fine durability. The 2.5mm-10.5mm height adjustable drilling core is designed for quick holes opening. Suitable for drilling on pine wood, solid wood, density board, shaving board, medium-density fiberboard, etc. Easy cooperating with flat-edges trimmers, electric routers, vertical carving and milling machines, automatic engraving machines, etc. Premium Material: It is made from b carbide material, it has high strength, high hardness, wears resistance, and fine durability. Height Adjustable: The 2.5mm-10.5mm height adjustable drilling core is designed for quick holes opening. Stable Fixing: The hexagon screw for fixing the drill bit, and the round shank chamfers for easy clamping. Applicable Materials: Suitable for drilling on pine wood, solid wood, density board, shaving board, medium-density fiberboard, etc. Applicable Equipment: Perfect for cooperating with flat-edges trimmers, electric routers, vertical carving and milling machines, automatic engraving machines, etc. 5 Models Optional: You can choose 8*8*2.8mm, 8*8*3.0mm, 8*8*3.2mm, 8*8*3.5mm, 8*8*4.0mm according to your demands. Specifications: Name: 8mm Shank Router Bit Material: carbide Type: 8*8*2.8mm, 8*8*3.0mm, 8*8*3.2mm, 8*8*3.5mm, 8*8*4.0mm (optional) Adjustable height: 2.5-10.5mm Item size: 74.8 * 26.5 * 26.5mm / 2.94 * 1.04 * 1.04in Item weight: 67g / 2.36ounce Package size: 83 * 40 * 38mm / 3.27 * 1.57 * 1.50in Package weight: 8*8*2.8mm: 80g / 2.82ounce 8*8*3.0mm: 78g / 2.75ounce 8*8*3.2mm: 81g / 2.86ounce 8*8*3.5mm: 83g / 2.93ounce 8*8*4.0mm: 82g / 2.89ounce Packing List: 1 * Router Bit 2 * Wrensh 1 * Plastics Box