This carbide tipped valve spring seat cutter is for enlarging/correcting valve spring pads to lower spring seats for higher lift cams
This tool is used in conjunction with hardened ground pilots, each can be purchased separately depending on the required pilot size
KL1438B – 11/32″ Pilot
KL1442B – 3/8″ Pilot
KL1435B – 5/16″ + 8mm Pilot