Mack/Tidwell 3 Piece Brush SetMack Tidwell 3 Piece Brush Set From the manufacturer: The new 3 piece paint brush set Five Speed: Which is a larger version of the SLIM from the original set. The five speed is basically a #5 script scroll brush as the slim was basically a #3 or so. Heavy: Which is a larger version of the LIL BIT MORE its a little longer and fatter so it has a ton of uses seriously. One Liner: This is a completely new brush it is Amazing for outlining, details, med.