Roberts Heavy Duty 10-195 6" Convertible Scraper is the deal.
You can beat the crap out of this thing to remove adhesive, carpet, tile and other flooring. Use your rusty stretcher tube for stand up action. The spin type lock handle adjusts 360 degrees to any position for hard to reach areas. Includes a 6" hardened steel reversible blade, heavy duty cast aluminum scraper head and a hardened steel locking cam.