Stainless steel and high-impact plastic construction. Available in two designs selected by the type of cage in use. Rodent Swivel Retainer | Part No. RS 01 | | | | | Rodent Swivel Retainer for Shoebox cage | Part No. RS 02 | | | | | Rodent Swivel Retainer for Double Shoebox Mounting Clip | Part No. RS 03 | | | | | Rodent Swivel Retainer for Double Swivel, Top Mounting ShoeBox | Part No. RS 07 | |