Wheels can be adjusted for straight, irregular shapes, or circle cutsNew design allows you to use the third wheel in conjunction with the Magnetic Torch Guide (MSG230) for precision burning or beveling edges of plate, beams, channels, and moreThe head of the new guide will now lock in place for straight 90 degrees or bevel cutting at 22.5 degrees, 37.5 degrees, and 45 degreesUniversal bushing fits all conventional torches5/16 inch x 15-1/2 inch hex arm extension (3311-EX) is available for larger circles (sold separately)