Entire sides of wheels are fine saw encased but see back and front of box to catch the rock abrasives. Thus Wheel Outline of catcher C Catcher hard saw Diamond saws. Was not make them. Tried it but not successful. Buys them where one did. However uses tub for. Band saw does all the work. Canada Balsam. Buys the best clear balsam in one oz. tubes. Cost about $150 per doz. of Arthur Thomas Co, 12th and Walnut, Phil. or Williams Earl and Brown, 1010 Chestnut st. Phil. Takes a lot of it into a dish and dents it on a slow fire under heating table. In an hour or more takes a little on a needle cools it by hand and tests it on finger nail. The amount (a max) of cooling depends on season of year. Harder in winter in summer and less (or softer) in winter. It should be so hard that one can just about dent it with the finger nail.