Its a tactical missile; its range is not suited for the N-strike mission unless you are talking of battlefield nukes.
Given Saudi Arabia’s primary concerns, it only needs to deliver nukes to the most important targets in Iran, so the K, with a 310 mile range, might be adequate for their strategic needs.
The E model, with 173 mile range would not do the trick, though.
If I'm looking at the right missile, its more than a battlefield rocket/missile. It has a throw of 2,000 lbs and a range of up to 300 miles, with an accuracy of 7 meters.
For the Saudis, about 30% of Iran is within 300 miles, so that makes it strategic to a degree. Problematically though, I think most of the Iranian nuclear sights are outside of that range.
Still, if the Saudis purchase hundreds of these, they could wipe out Iranian airfields and SAMs in the strike corridor.
Riyadh is outside of SBM range, coming from Iran, but all of the Saudi ports Gulf ports are within easy range, so they will need to worry about Iranian SBMs purchased with Obama's new fun money.