SIGMA Kera-Cut Wheel cutting This item is currently only available in-store. Need a hand? Give us a call 0800 NZ TRADE or Contact us Sigma Kera Cut spare cutting wheel with axle, art. 12391 Suitable for all Kera Cut cutting bars. Technical data: Diameter: 13 mm Drill hole: 4 mm thickness: 3 mm The Sigma Kera Cut cutting wheel is perfect for cutting large format tiles. It scores the tile cleanly and promises the best cutting or breaking results.