PETZL William Locking Carabiners (2016) Black Large Color:Black NFPA 1983 Technical Use William B0FQP2ZC5W NFPA 1983 Technical Use William SL carabiner William SLN carabiner William BL carabiner William BLY carabiner Reference M36A SL M36A SLN M36A BL M36A BLY Weight 85 grams 85 grams 90 grams 90 grams Locking system SCREW LOCK SCREW LOCK BALL LOCK BALL LOCK Major axis strength 27 kN 27 kN 27 kN 27 kN Minor axis strength 8 kN 8 kN 8 kN 8 kN Open gate strength 8 kN 8 kN 8 kN 8 kN Gate opening 28 mm 28 mm 27 mm 27 mm William TL carabiner William TLN carabiner William TLY carabiner Reference M46A TL M36A TLN M36A TLY Weight 90 grams 90 grams 90 grams Locking system TRIACT LOCK TRIACT LOCK TRIACT LOCK Major axis strength 27 kN 27 kN 27 kN Minor axis strength 8 kN 8 kN 8 kN Open gate strength 8 kN 8 kN 8 kN Gate opening 27 mm 27 mm 27 mm 180 Degree Panoramic Anti Fog Anti Leak with Camera Mount Foldable Snorkel Mask or the manual SCREW LOCK Facilitates connection of multiple items