Up to three times faster than a standard drill - Flat drill bits are a great accessory for electricians and other installers as well as construction workers. With Bosch Tip Technology, it is possible to work even faster and more efficiently. The Expert SelfCut Speed offers the most advanced designs for flat drill bits. This makes it easy to use and extremely practical for professional users. The patented thread tip from Bosch pulls the flat drill bit into the wood with minimal pressure. This is particularly helpful when drilling overhead or in tight spaces. The advanced paddle design ensures additional speed. The Bosch Expert SelfCut Speed flat drill bit is suitable for softwood boards, chipboards, or particle boards alike. It provides craftsmen with efficiency and comfort when they need to drill through holes or blind holes to install cables, dowels, or other hardware. The hexagonal shank ensures maximum power transfer in standard drill chucks and hex screwdriver chucks. Diameter (D) mm: 28.00, total length (L2) mm: 400, shank diameter (d) inches: 1/4.