Drill Bits for Rock Drilling Drill bits for rock drilling are available in the following sizes: • 7 Degree Taper Button Bits – ranging from 32 mm to 48 mm • R25 Rope Thread Button Bits – ranging from 35mm to 45mm Bigger sizes are also available by special order. Contact us at WALT-AIR Tool & Plant Limited to buy drill bits for rock drilling. We offer high-performance drill bits that are designed for challenging ground conditions. They provide efficient penetration, reduced wear, and reliable results at construction, mining, and quarrying sites. https://www.walt-air.co.uk/product/button-bits/