Dormer B33412 0052211 expanding hand reamer, 6-flute, HSS, internal designation N12. Designed for precision reaming of pre-drilled holes, this reamer features an expanding design for adjustable sizing. High Speed Steel construction provides durability and wear resistance for general-purpose applications.

Adjustable hand reamer with replaceable blades (B335) and a square drive, diameter range 37.0 - 45.0mm number 12 with an overall length of 325mm and long replaceable blades with 20mm taper lead, according to DORMER standard for light duty sizing of uninterrupted holes, HSS with bright finish for machining free machining, plain carbon and alloy steel, grey and malleable cast-iron, wrought and cast aluminium and copper or copper alloys.