Peterson's U-Bend-IT SA kit equips you with the narrow width 0.100" tension tools useful for tighter keyways. Set contains 1 Bending Tool, (5) 0.015" Blanks, (5) 0.020" Blanks, (5) 0.025" Blanks and (3) 0.030" Deluxe Blanks. Very useful when flat spring stock is required.