This Bosch EXPERT Self Cut Speed drill bit set is designed for high-speed drilling into wood. It features a self-feeding threaded tip and a specially wave-shaped spade for rapid chip removal, making it up to three times faster than standard bits. The set includes six bits with sizes 13mm, 16mm, 19mm, 20mm, 22mm, and 25mm, all with a 1/4-inch hex shank for compatibility with most power drills. Suitable for soft and hard wood, light building materials, and plasterboard, these bits are ideal for electricians and building professionals needing to drill holes for cables, pipes, and hardware installations. They come supplied in a durable roll-up case for convenient storage and transport.