Bosch EXPERT HEX-9 Hard Ceramic Tile Drill Bit 4mm 90mm Pack of 1

About this tool

This is the 4mm variant of the Bosch EXPERT HEX-9 Hard Ceramic Drill Bit, supplied as a single bit with a 90mm overall length. The 4mm diameter makes it ideal for smaller fixings and pilot holes in hard ceramic tiles, porcelain, and similarly demanding tile materials. Built around Bosch's Carbide Technology, the tip is precision-ground using fine grinding techniques to produce razor-sharp edges in the hardest metal. The multi-faceted, asymmetric tip design shares the cutting workload efficiently, while the integrated centring point gives you a precise, skid-free start — no lubricant or cooling needed. It lasts up to 10x longer than the Bosch CYL-9 Soft Ceramic Drill Bit, making it a highly cost-effective choice for regular tiling work. Features and Benefits: • Lasts up to 10x longer than the Bosch CYL-9 Soft Ceramic Drill Bit • Bosch Carbide Technology for exceptional tip durability • Multi-faceted tip for efficient drilling across hard materials • Fine-ground carbide tip for razor-sharp cutting edges • Centring tip for accurate, skid-free hole starts • Hex shank for strong connection and maximum torque transmission in three-jaw chucks and ¼" internal hex tool holders • Dry drilling — no lubricant or cooling required Specifications: Diameter: 4mm Overall Length: 90mm Quantity: 1 Contents: • Pack of 1

Retailer description · My Tool Shed · Observed 8 Oct 2026. Check the retailer’s listing for full specifications and contents.