Square D (Schneider Electric) 9007CA11 Limit Switch Lever Arm. Square D™ OsiSense® Limit Switch Lever, Heavy Duty Rotary Standard Format, Series: 9007C, 2 in Arm Length, 3/4 in Roller Dia, 1/4 in Roller Width, Outside Roller Position, Steel Roller, Zinc Plated Arm. Additional Description: SQD -9007CA11 LIMIT SWITCH LEVER ARM 2IN C. Catalog Description: limit switch lever arm, 9007C, 2 inch long cast zinc lever arm, 0.75 inch diameter roller, 0.25 inch wide roller.