ITW MASH Hook
The MASH (Metal All-purpose Snap Hook) gateless snap hook offers an alternative to the HK-style snap hooks in common use for sling systems.
The MASH is constructed from stainless steel and comes in sizes for 1" wide webbing. Pressing on the thumb tabs in the middle separates the two rings, allowing the MASH to be slipped into any loop attach point. It's simple to use and more secure than the HK-style.
It is common to wrap 2" elastic around the Mash hook while attached to smooth out the appearance and reduce some metal on metal contact with a weapon.