"The SRP Torch Mounts feature V-lock technology allowing you to mount any cylindrical torch to the arm. The provided o-rings are ideal for 1"" (2.54cm) diameter torch bodies. The o-rings can easily be swapped for different size o-rings, allowing you to mount torches from 0.75"" to 1.5"" in diameter. The Flexible Arms are made of 1/2"" diameter Loc-line, are 5.5"" long when assembled and include a 1/4""-20 stainless (marine grade) screw interface on each end. This means that if you buy a different torch system at a later date that accepts a 1/4""-20 screw, you can simply remove the V-lock mounts and connect the new torch(es) to the Locline directly."