Valve Seat & Face Cutter Set Of 15PCs Carbon Steel With Wooden Box. Best Use For all Vintage Cars, Motorcycles. These Valve seat Cutters are Made of high carbon steel, properly hardened and tempered, each cutter in accurately grade for best results. These are must for Vintage Car, Bikes. 12 x HCS Cutter Set. 70 / 20 Degree Bore Cutter. 1 ¼”, 1 ½”, 1 ¾. 1 3/16″, 1 ¼”, 1 5/16″, 1 7/16″, 1 ½”, 1? “, 1 ¾”, 1? “. 8 Pilots / Guides / Stems Sizes : 7mm, 8mm, 8.5mm, 9mm, 10mm, 5/16″, 7/16″, 11/32. Arbor / Stem Rods : 1 Piece. Stem Handles : 2 Pieces.