For a limited time, Rockler has several All-In-One clamp lengths on sale. To refresh your memory, an All-In-One can be used as a clamp, a fence, and edge guide, or an adjustable T-track. All-In-Ones are accurate, reliable, and can endure a fair amount of abuse.
And at $26.24, the 50″ clamp gives you the most bang for for your hard-earned buck. But bigger isn’t always better. Personally, I prefer the 36″ clamp — on sale for just $24.50 — since it can be used with greater ease on small tables and mobile project centers. Of course, if you’ve got some excess scratch, you could always buy both.