how to measure Snap-Off Blades

[angellonewolf]

a snap off bladed knife replacement blade but there are meny out there

from looking i think there are measured from the cutting edge to the top

can any one confirm this as they are only a £5er for 10 but dont want to buy more kit that will just be lying around not used if not the right size

 

[pedrobedro]

From the back edge to the cutting edge usually. Pack of 5 macAllister blades at B&Q for 50p. If you get the wrong size a handle to fit them is not expensive.