They are stamped 'Heavy Duty', 'Made in Sheffield'
These Stanley knife blades are used by our own teams of fitters throughout the UK. There is not a better product on the market, hence that's why we PERSONALLY use them.
They are a professional carpet fitters blade that we use every day.
HEAVY DUTY 0.6mm BLADES IN A
LIGHTLY OILED IN PACKS OF 5
FITS ALL STANLEY TYPE UTILITY
and all universal the use these types of knifes over thousand different uses!!