Sunnen Hone Mandrels, Bore Honing Tools BL12

K series ( K3 AK20,  bore diameter range from 2.54mm to 25.48mm)
BL series (BL3 BAL20,  bore diameter range from 2.54mm to 26.19mm)
L series (L6 AL20, bore diameter range from 2.54mm to 26.19mm)
Y series honing mandrels.
Diamond inserted honing mandrels

Extra-long mandrels with extended shank
S = soft shoe steel mandrel, for honing most materials.
H = hardened shoes steel mandrel, for production honing of hard, rough parts, carbide, ceramic, glass.
B = bronze mandrel for producing very fine finishes and honing exotic metals.