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, even faster and more efficient use is made possible. The Expert SelfCut Speed offers the most advanced designs for flat drill bits, which are easy to use and extremely practical for professional users. Bosch's patented thread tip pulls the flat drill bit into the wood with minimal pressure. This is especially helpful when drilling overhead or in tight spaces. The advanced paddle design provides additional speed. The Bosch Expert SelfCut Speed flat drill bit is suitable for softwood boards, chipboards, or particle boards alike. It offers craftsmen efficiency and comfort when drilling through holes or blind holes to install cables, dowels, or other hardware. The hex shank ensures maximum power transfer in standard drill chucks and hex screwdriver chucks. Diameter: 22.00 mm, total length: 400 mm, shank diameter: 1/4 inch.