For pricechoose optionsSelect Option 10mm (7/16in) 6mm (1/4in) 8mm (3/8in) Quantity Add to Basket RUBI Carbide Scoring Wheel made of high quality tungsten carbide. Patented model with new high technology RUBI® alloy; maximum precision and resistant to wear.Compatible with RUBI TS-MAX, TR-MAGNET and SPEED-MAGNET cutters.