●High-quality stainless steel material adapter for hand power tools grinder, wet polisher, maximum 12,000 RPM Rating ●Central water hole for water flow up to the diamond tools in use ●Can be used with M14 female threaded Core drill bits, Hole saws, Profile wheels, Cup grinding wheels, Other compatible tools ●Good Anti-oxidation and corrosion resistance ●Super supporting force and load-bearing force, not easily deformed