These are very very strong & really well engineered, they fit straight onto a Weaver/Pica-tinny rail with the quick release mount.
Suitable for heavy guns, very stable.
The legs fold back flat when not in use & extend in stages.
They are made from Steel, Alloy & Carbon Fibre.
The outer sleeves of the legs are Carbon Fibre the rest is mettle.
Height Closed 8 inches.
Height Fully Extended 12 inches.
Width of legs apart retracted 12 inches.
Width of legs apart Fully Extended 15 inches.
I No Bi-Pod.