As was stated before, this model of the Single Arbor Rip is more heavy duty and is made to cut bigger material than our model 1538 Single Arbor Rip.  Just what are the differences: Well, we compared them below for you.
Single Arbor Rip-Model 1538
Heavy Duty Single Arbor Rip-Model SBR416
*12" Wide Cutting Capacity

*Min. Cut Length-10"

*Max. Cut Height-4"
*16" Wide Cutting Capacity

*Min. Cut Length-26"

*Max. Cut Height-2"