Check the listing for details. Boss Pet XL Tie-Outs with Welded Chains 4.2mm x 20 ft. Width: 3.5, Condition: New. Listed at 104.35 USD. Boss Pet XL Tie-Outs with Welded Chains 4.2mm x 20 ft bBoss Pet Large Dog Tie-Out Welded Chains are constructed of high quality welded links and premium quality die-cast iron swivel bolt snaps. Strong 4.2mm thickness rated for extra large dogs up to 60 lbs.