All my life what ever i did i tryed to have all the necessary tools on hand. I did all trades plus handyman,tradesman stuff .If i couldn't do something one way i had 5 other ways i could get the job done with 3.5 tons of tools on the job in the step van .Scrollings the same thing .I have every blade, all sizes, for metal ,plastic, wood, etc .If i didn't i would have lost some jobs. At 30 cents a blade why scrimp,lol