I have the entire set of the Sawtooth soles. They work very very good. These soles are a must if you travel a lot and bowl at a lot of different houses. I have had others try these soles and everyone has loved them so far.

The idea of having the split soles have actually been in use by most of the Dexter bowlers for some time now. Dexter is making these soles to make it easier for the consumers to just have a sole already split instead of having to cut up their personal soles to combine.

The way the soles come is almost a big rectangle. It is really the bowler's preference on if they put the faster or slower one in front. For me, I always have the faster sole in the front so its is more of a progressive slow down slide. The way the sole comes from Dexter, you also get to decide how much of each sole is actually on the shoe. I have soles set up that are majority the faster sole and majority the slower sole. My advice would be to cut the sole so it is big and bowl with it that way. Then fine tune from there.
I hope this helps.