Sun Hydraulic cavity tools are available in both HSS roughing step drills and carbide tipped finishing versions.
Products ending in -A are ALTiN Coated
AN818 Port Contour Tool
AND10050 Reamer Pilot Port Tool Carbide Tipped
AND10050-S Port Cutters Carbide Tipped
AS5202-R Port Cutter Tool - Reamer Pilot (also MS33649)
AS5202-S Port Cutter Tool - Solid Pilot (also MS33649)