With an ABUS shackle collar and a chain, you can affix any one of our 83 series padlocks to a specific location to help prevent loss and contamination of the padlock. The padlock shackle collar slides up the leg of the shackle on the fixed side and holds the chain attached to the padlock when open. Shackle collars are available for 5/16”, 3/8” and 7/16” diameter shackles and can be purchased individually or in a collar kit which includes 6 collars of each size (part #83000K).