12 Pieces Engine Valve Seat High Carbon Steel Face HCS Cutter Set + 1 Arbor + 8 Guides + 2 T-Handle + HEAVY Wooden BOX. 20 Degree Bore Cutter : 1-1/4″, 1-1/2″, & 1-3/4. 45 Degree :1-7/8″, 1-3/4″, 1-5/8″, 1-1/2″, 1-7/16″, 1-5/16″, 1-1/4″, & 1-3/16″. 8 Pilots / Guides / Stems Sizes : 7mm, 8mm, 8.5mm, 9mm, 10mm, 5/16″, 3/8″, & 7/16. Arbor / Stem Rods : 1 Piece. Stem Handles : 2 Pieces. Total 23 Pieces set. Weight : 2.307 kg.