Alesatori manuali regolabili da H12 a H16 da 1,1/16" a 2,7/32" set da 26,98 a 56,35 mm USA
H12 (I) ~> 1.1/16" - 1.3/16" (26.98mm - 30.16mm). The blades are made of carbon steel for long life and can be adjusted by loosening one nut while tightening the other. They are used mostly for repair work in the field.