Adjustable Hand Reamers H12 To H16 1.1/16" To 2.7/32" Set 26.98 To 56.35mm UK
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.