Details from Spark R&D:

Splitboard Skin Tailclips 

Our tailclip kit is a retrofit addition to any skins. Large diameter rivets make for an easy and secure installation. Asymmetric clips with dual angled hooks and an extended slot design yield maximum adjustability to fit any board shape (even swallowtails).

Weight: 1.94 oz/pr (55g)

Kit Includes: stretchers, clips, a nail, and rivets.

*Patent Pending