BGS 1970 Valve Seat Cutter Set 30 60 mm 27 pcs.

not suitable for hardened valve seats in metal case milling at 45° and 90°: 30 - 32.5 - 35 - 37.5 - 40 - 42.5 - 45 - 47.5 - 50 - 52.5 - 55 - 57.5 - 60 mm 13 stem guides: 6 - 6.5 - 7 - 7.5 - 8 - 8.5 - 9 - 9.5 - 10 - 10.5 - 11 - 11.5 - 12, Manufacturer: BGS