The 316 model hanger is our first new design addition in over a decade. Following mandates of the EU. All reputable manufactures shall produce anchors made out of 316 Stainless steel, these hangers are conducive to all but the most corrosive environments. (Marine environments). While our 038 model will still be our work horse hanger, we felt like there were improvements to be made. Conical Washer- The rim of the bolt hole protrudes slightly into a conical shape, away from wall. Pulling the hanger will generate a spring effect that provides constant pressure against the wall, multiplying the strength of the torque. It also allows better control upon tightening. When placed properly, the hanger maintains a constant pressure that expands the force between the bolt and the wall. Fixing pins/Dimples- We have increased the distance from the bolt hole and the three dimples. Achieving more force to prevent the hanger from rotating. Weight- We have decreased the thickness from 4mm stock to 3.5mm. This has reduced the weight of the hanger. Durability to equipment- We have rounded the edges of the hanger. This will eliminate damage to carabiners and quick links. Geometry- The shape has changed slightly. When placed under a roof, the carabiner will be routed so that it never comes into contact with the projecting head of the bolt. 5620lbs / 25kn CE/UIAA Certified Life Safety EN959 3.5mm Stock 316 Stainless Steel 2 Carabiner Capacity, Weight 56g - 57g Fixe Wedge Bolts are designed for rockclimbing. We use (A-304) Stainless Steel rod stock to manufacture our Stainless Steel Models. The 10mm threads are stamped, not milled to ensure the highest possible strength. All INOX models include a stainless nut and washer. Double Wedge Bolts have two expansion points. #140, #240, #340 require 3/8" hole, This bolt requires a 17mm wrench. 3/8" Bolts TORQUE TO: 25 Foot Pounds / 35Nm