The Scotch Eye Auger Bit 10mm x 400mm Bulk is a long, specialized drilling tool designed for creating deep, precise holes in wood or other soft materials. The 10mm diameter allows for medium-sized holes, while the 400mm length enables deep drilling, making it suitable for tasks like timber framing, fence posts, or other woodworking applications where depth is needed. The scotch eye refers to a type of handle design at the back of the bit, which allows for easier rotation using a hand tool or auger. Sold in bulk, this auger bit is perfect for high-volume projects requiring repeated drilling.