This is the Trident 2pc. Easy Dispatch Snorkel Keeper Features: Helps hold snorkel position, prevents snorkel loss Quick release snorkel keeper for attachment of snorkel to mask strap Constructed of impact resistant plastic Makes attaching or detaching snorkel fast and easy The Trident 2 Piece Sliding Snorkel Clip For Attachment To Mask Strap keeps your snorkel on your mask strap. Slide the open, round sleeve over your snorkel and push down to the desired location. Slide the other piece onto your mask strap. To attach your snorkel, just slide the peg at the side of the sleeve into the slot on the other piece. The snorkel holder helps stabilize the snorkel in position during use, and prevents snorkel loss when the user lets go of the snorkel mouthpiece.