The special feature of this system lies in the fastening necking. The necking is made out of a special type of brass with the required elasticity for assembling and dissembling the fitting. Its symmetrical shape enables it be mounted in any position.The locking system is “by points”, which prevents the cutting of the pipe and offers a better adaptation to the possible ovalizations and/or imperfections of the pipe.It is not necessary to disassemble the fitting to install it. Specially adaptable for connecting low and high density polyethylene pipes.