ProClimb 50kN Rescue Big 8 Stainless Steel Descender with Bent-Ears (Silver) Made of high polished stainless steel, this rescue descender can hold up to 11,240 lbs of force with anti-burn tab for holding device when hot from a vertical descent. The ears prevent the rope to slide & locking up, which makes it a much safer & versatile device. The thick body largely decreases the abrasion or wear of rope to a minimum level and is suitable for use with rope sizes 11 mm to 16 mm in diameter. The descender can be used in an array of activities including boating, arborist, rescue, aerial silk & other climbing. All rescue descenders meet CE and UIAA Standards.