Up to three times faster than a standard drill - flat drill bits are a great accessory for electricians, other installers, and construction workers. What if they could be even faster and more efficient? With Bosch Tip Technology, this is possible. 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 from the user. 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. Hex shank for maximum power transfer in standard drill chucks and hex screwdriver chucks. Diameter: 30 mm, total length: 400 mm, shank diameter: 1/4 inch.