SQUARE D 9007HA1 Roller Lever Arm, 0.88 to 4 In. Arm L. More details: Roller Lever Arm, Arm Length 7/8 In. to 4 In., Roller Dia. 0.63 In., Roller Width 0.25 In., Arm Material Steel, Roller Material Steel, Arm Depth 0.08 In., Arm Width 0.72 In., Roller Position Front, For Use With Mfr. No. 9007C, 9007AW