Viking synthetic winch lines come with a special drum attachment to secure line to the drum, if you have a winch that used a battery style terminal end from the winch manufacturer then our special drum attachment will work on your winch. If you have Superwinch or any winch with a hole drilled into the drum please see instructions below. If your winch has a hold drilled into the drum but not all the way through you will need to drill the hole through the drum, make sure you check with the winch manufacturer to ensure this is recommended. On the Superwinch EP and EPi the hole is drilled most of the way through and it takes very little effort to drill through, we have verified with Superwinch that this is alright to do.