Quad Anchors a.k.a. 2 Piece Anchors
Like most aspects of climbing, there are many ways to build a good quad anchor. This kit weighs only 152g and still has a locking HMS biner.
You may need additional equipment. This is not a recommendation! I am sharing my opinions, which might be wrong. Remember, buying equipment does not equal knowing how to use it. These kits are NOT designed for industrial or professional rescue work.