Flex Hones for finishing and adjustable hones for sizing.
Sunnen, Regis, Goodson
P-190 Valve Guide Hone Set
Convenient set includes tooling and abrasives for the most popular
valve guide diameters for automotive cylinder heads. See chart and
information below for a complete listing of available tooling and
items included in P-190 set. A slow speed drill (approximately 200
rpm) is recommended for driving power.