What is the name of this type of door closure/handle?

[Dale Coons]

I have a shed with a door handle that rotates 90 degrees. When horizontal, it pushes two rods, one up, one down into holes at the top of the door jam and into the floor of the shed, securing the door. Turning the handle vertical pulls the rods out of the holes and allows the door to open.

I'm rebuilding the shed and I'd like to use similar hardware. I'd reuse what's there but it's 40 years old and getting worn out--and I've already trashed it.

I've been looking in stores and online to no avail--mostly I'm sure because I don't know what I'm looking for. What is this style of closure called?

Tx in advance,

Dale

[Jaromir Svoboda]

2 or 3 point locking latch systems
http://www.atlanticshed.com/2point.htm

[Bill Dufour]

Similar to the cable operated garage door locks as well.

[phil harold]

Cremone Bolts