ROK 4-1/2 inch Diamond Saw Blade Set, Pack of 3 - - Amazon
For the price, this set of three blades is a bargain. I needed a continuous blade to cut some ceramic tile. The blade worked well enough. I used the included size adapters so the blades would fit the 5/8-inch shaft of my grinder. The adapters pressed easily into the center hole with just thumb pressure on all three blades.