What this roller can do is to remove the wrinkles of material and be able to restore its width to the standards ( No.1 ).
And it also can prevent the material grain from meandering ( No.2 ).
To lighten the longitudinal edge shortening tendency, this roller works really well ( No.3 ).
The area where catch the material is really big, which means the material will not slip and is fed well. You can easily adjust the amount of sideway slide from zero to six according to the material. All you have to do is twist the hexagon screw. Quite easy.