mine is yellow and blue with a little red knob, no makers name, it just says Compass Cutter. I really can't see how one bit would be so different from the other, unless you undid the screw, and took the moveable part out, and put it back in upside down. Then you KNOW it wouldn't be able to cut! Very strange!! Jacqui x
when you first buy it, the blade is in the wrong way round for safety, so you have to swap it over, I daresay that perhaps if you are left handed tho' that may be the way you have to use it, x