Dormer B100 B1001/4 HSS High Speed Steel Straight Shank Hand Reamer with H7 Accuracy, Diameter 1/4 inch, Single Pack

High H7 accuracy - designed to finish holes within the limit of H7 hole tolerance (ISO limits and fits) Premium HSS material - can be used for reaming in many materials including steels, aluminium, stainless steel Tapered lead (Form B) - allows easy location and centring to improve accuracy and performance Precision ground geometry - left hand helix and right hand cutting provides smooth reaming and improves holes size and surface finish Straight shank with square drive - design primarily for hand held reaming with suitable wrench