Steer Alley Frame with ShieldsPriefert's Steer Alley Frame with Shields functions to eliminate leg traps and to block the space created at the connection ends of the alley when the alley width is adjusted. Steer Alley Frame With Shields SPAFWS Prieferts Steer Alley Frame with Shields are required at each end of a Priefert Steer Alley to complete the setup. The shields function to eliminate leg traps and to block the space created at the connection ends of the alley when the alley