Husqvarna 532176138 Interlock Push-In Switch For Husqvarna/Poulan/Roper/Craftsman/Weed Eater Safety switch used on many models Current part number 532176138 replaces previous part numbers 153664, 532153664, 532161343, and 176138. Replacement part for many brands including Husqvarna, Poulan, Poulan Pro, Roper, Sears/Craftsman, and Weed Eater Original equipment manufacturer replacement part 1-year warranty for defects in material or workmanship