ALL THESE CUTTERS ARE DOUBLE SIDE FACE CUTTER. 5 pcs Valve Seat & Face Cutter Set. CUTTER SIZES AS UNDER 1.1/2" - 20 DEGREE ANGLE CUTTER. Properly Heat Treated and tempered for Longer Life. 1.5/16", 1.7/16", 1.5/8", 1.1/2" - 45 DEGREE.