They are essential for maintaining proper engine performance by ensuring a tight seal between the valve and its seat. This is must for Car, Bikes, Jeep, Tractors, and Trucks Product specifications: High Speed Steel Size: 1-3/16 45 Degree Applications: High Speed Steel Best Use For all Cars, Jeeps, Tractors, Trucks and Motorcycles and Jeep, Vintage Morris, Mini, Mercedes, Perkins P-6, Leyland. High Speed Steel (Hss) 1-3/16 45 Degree Valve Seat Cutter For Car, Bikes, Jeep And Bus, Truck DESCRIPTION: This Cutters Made High Speed Steel, each cutter in accurately grade for best results. With better heat and wear resistance than high-speed steel, these cobalt steel keyseat cutters can run at higher speeds and provide better performance on hard material. They mill precise notches in rotary shafts to fit machine keys and can also be used for slot milling 31 Pcs Valve Seat Cutter Set High Carbon Steel 1.3/16 To 2.1/8 45 Deg | Valve Seat Cutter Predator 212 Valve Seat Cutting Kit Race Kart Clone Mini Bike 3 Angle Valve Job High Speed Steel (Hss) 1-3/16" 45 Degree Valve Seat Cutter For Car, Bikes, Jeep And Bus, Truck DESCRIPTION HSS HIGH SPEED STEEL VALVE SEAT CUTTER SET FOR CAR BIKE ENGINE | Performance Cutting | Repair Automotive Tool Inlet Exhaust Cut Valve Restoration5 Pcs HSS Valve Seat Cutters Set10 Pcs HSS Valve Seat Cutters Set15 Pcs HSS Valve Seat Cutters Set 20 Pcs HSS Valve Seat Cutters Set 24 Pcs HSS Valve Seat Cutters Set