Double Stake Swivels with a #6 J-Hook are used for attaching to the end of a trap chain and cross-staking traps and/or securely staking the Collarum cable in large animal situations. You use 2 rebar stakes (typically 18″ -24″ in length) and drive into the ground so they form an “X” below ground level, this makes it nearly impossible for an animal to pull up from firm ground. Please Note: Sandy or Soft soils,i.e. muddy conditions may warrant longer rebar stakes.