Petzl long life bolt Driving the pin into the bolt expands the shaft in the hole. It is a strong bolt and lasts long but is not safe in medium to soft rock. The Petzl Long life nail drive bolt is a 12mm diameter, 46mm long stainless steel bolt with a steel pin set in the shaft. Then replace with 8mm twist bolt which takes 16mm hole . After a routine investigation where a bolt could be pulled out by hand several more bolts of the type was found to not hold for even a 6kN axial pull. They are easy to place and are actually very strong in hard granite. Petzl used to sell one called the “Petzl Long Life”, clever name for a bolt, but apparently it wasn’t popular enough and was expensive. Some are flush with the hanger and prevent hanger thieves, others have nuts that hold down the hangers. Drilling small holes around the bolt. Ice screws, multi-directional hangers, glues for climbing anchors, anchor plates: from the highest summits to the deepest caves, Petzl anchors are a guarantee of quality for outfitters and practitioners. Aug 25, 2021 · A Petzl long-life stainless-steel bolt is a ½ inch in diameter and 2 inches in length. It has a steel pin set in the shaft. . Caving Vlog #69A short video showing the technique for placing Petzl Long Life P38 bolts used in cave exploration. Caves are delicate and potentially dangerou I have removed bad ones by redneck core drill method. Older Petzl Longlife "type1" bolts possible to pull out by hand. pyx apcjb bfulku whrwbbm bwpnir drffcq iiqgr feq vnqsnqt gmpxu