Our newest holder uses a 3/8 316 stainless steel swivel bolt snap with split ring on one end of the holder and a high retention force plastic clip on the other end.
You can clip off to d-rings, use them to hold your smb in place by securing from the smb to d-ring on your rig
We found many uses for these holders and even hold your gloves or mask when getting into or coming out of the water
 "Accessory Holder \"High Vis Neon Yellow Holder\"")
