Hilmor 1839031 SB SPRING BENDER 4 PK 1/4 TO 5/8Getting an accurate bend by hand isn’t always easy. But, our Spring Benders can help simplify things. Four different benders are included to fit 1/4”, 3/8”, 1/2” and 5/8” tubing. Simply slip the Spring Bender over soft copper or aluminum tubing, and count on the spring to keep the tube from deforming out of round.