Tractor-Mounted Bale Spear (Dual Spear design) Bush Hog® BS series bale spears are built Bush Hog® tough. With a lift capacity of 3,500 pounds and the capability of being mounted on a universal skid steer frame, these bale spears are designed to lift, transport, and stack round or square bales of hay or other organic matter. Let Bush Hog®’s BS series bale spears help you get your work done faster. The BS2 is a dual spear design. This design allows the moving of large bales with greater speed and stability while using a skid steer or Ag loader. The BS2 is a dual spear design. This design allows the moving of large bales with greater speed and stability while using a skid steer or Ag loader.