MacInnes Glass Cutter, Right Hand, #4 Wheel The best kept secret in glass cutting. Used by artists and professionals for decades #4 wheel has 134 degree hone angle Wheel is 5/32 inch in diameter, the best size for cutting to patterns Can be used dry or dip in light oil before scoring your glass sheet Suitable for cutting most soft surfaced glass such as cathedral glass. Use #1 Wheel for hard surfaced glasses such as solid opals.