Locker Benefits. Full Power Delivery to Both Wheels. Provides Doubled Traction Improvement. Greatly Exceeds Capabilities of Limited-Slip/Posi's. Proven Off-Road Performance. Automatic Operation (no compressor required). Uses No External Controls. Helps Prevent Axle Failure. Brute-Force Dependability. Easy Installation with No Special Tools & No Shimming. Re-use Original Differential Case. No Special oil Required. Works in Front and Rear Differentials. Controls wheel spin provides maximum traction. 2 Year Manufacturers Warranty. Look Below For Applications & Accessories.