Valve Seat Cutter Set Carbide Tipped – 3 Angle Restoration Kit – 20° – 30° – 45°. Racing Kart, Clone, Predator, Hemi, Honda, Briggs, BSP. Most Motorcycles or engines if they have a 4.5, 5, 5.5, 6,7 mm, 1/4 mm valve stem. If you are building or rebuilding your own small engines, either for performance. Or just a quality rebuild, this gives you control of cutting your own valve seats you can do a. Standard 45 degree seat or even 3 angle seat with this set.. You can move the sealing surface on the seat for best performance.. This one is MUST HAVE if you dealing with 4.5, 5, 5.5, 6,7 mm, 1/4 valve stems. This kit comes with the following. Valve Seat Cutter Kit Carbide Tipped. 3 Angle Cut As Original Seat. Cutters In The Following Sizes. 1st Top Angle & 2nd Base Angel Cutters. 22 mm 30 Degree & 45 degree. 30 Degree & 45 degree. 3rd Throat Angle Cutters. 23 mm 20 degree. 25 mm 20 degree. 28 mm 20 degree. 30 mm 20 degree. 32 mm 20 degree. 30 Degree & 45 Degree Cutters are Usable From Both Side As Other Side Is Grounded At 90 Degree. 6 Stem Guide’s Sizes. 4.5 MM – 5 MM – 5.5 MM – 6 MM – 7 MM – 1/4. 6 High Speed Steel Reamer’s Size. 1 Tap 3/8 UNF 24 TPI. Total 44 Pcs Set.