The following model has an extra thin blade thickness of .016", and blade length .118" - model 122-135 (0-1"/.0001") ... USD 289.00
The following model has carbide blades with blade thickness .016", and blade length .157" - model 122-151 (0-1"/.0001") ... USD 289.00
A note about carbide blades: although they won't wear down like steel blades, carbide blades are brittle and sooner or later they will break off, usually when you inadvertantly "twist" the micrometer while it's in a groove, and usually while you're in the middle of an important project. Repairs are possible but quite expensive when the carbide needs to be replaced. The moral: don't buy carbide unless you have a good reason. | 
