These are basic bent gate aluminum carabiners designed for clipping rope and bolts on big climbs. Light weight and super strong (22kN). They are 4" on the long axis, and have key gates for ease of clipping and snare free.  Huge 7/8" gate opening. Excellent for climbing runners, short clips and work belt tools.
Blue with silver gate weighs 2.2 oz.   Silver body with red gate weighs 1.9 oz.