I usually pick up packs of 10 thin metal cutoff wheels at Harbor Freight for 7.99, and use a 20% off coupon to get them for around 7 bucks with tax. They do not last as long as the better ones you can get from Lowes or Home Depot, but you sure cannot beat the price. Have not had a problem with any of them, and have gone thru probably around 50 wheels.