This 3 jaw puller has a 1 ton capacity. Maximum reach of 2-1/8" and the maximum spread of 3-1/4" . Screw size 5/16" - 24 x 3-7/8" . Jaw thickness 9/64" . Jaw width 1/4" These pullers are forged from quality steel, heat treated, and subjected to rigorous tests which exceed their rated capacity. These pullers enable you to remove and install parts for fast, effective repairs.