▁or ▁the ▁raw ▁product ▁itself ▁between ▁the ▁two ▁points . ▁ ▁Us es ▁The ▁tool ▁is ▁used ▁in ▁the ▁installation ▁of ▁all ▁public ▁util ities ▁electric ity , ▁gas , ▁phone , ▁and ▁cable ▁television ; ▁these ▁are ▁referred ▁to ▁as ▁product . ▁ ▁It ▁is ▁also ▁used ▁to ▁install ▁home ▁spr ink le ▁systems ▁and ▁auxili ary ▁home ▁power ▁lines . ▁The ▁tool ▁is ▁util ized ▁in ▁instances ▁when ▁it ▁is ▁difficult ▁or ▁cost ▁prohib itive ▁to ▁p low ▁or ▁tren ch ▁the ▁product ▁into ▁the ▁ground . ▁ ▁Some ▁of ▁these ▁instances ▁are ▁under ▁drive ways , ▁roads , ▁side wal ks , ▁and ▁land sc aping . ▁ ▁P neum atic ▁pier cing ▁tools ▁are ▁a ▁lower - cost ▁alternative ▁to ▁direction al ▁b oring . ▁ ▁How ▁it ▁works ▁The ▁tool ▁uses ▁air ▁to ▁p ound ▁its ▁way ▁through ▁the ▁ground ▁under ne ath ▁the ▁obst ruction . ▁ ▁The ▁tools ▁is ▁cyl ind rical ▁in ▁shape ▁and ▁ranges ▁from ▁one ▁to ▁eight ▁inches ▁in ▁diameter ▁and ▁between ▁three ▁and ▁six ▁feet ▁long . ▁ ▁It ▁is ▁made ▁from ▁metal . ▁ ▁D ifferent ▁manufact ur ers ▁have ▁different ▁front ▁styles ▁and ▁control ▁mechan isms . ▁ ▁Some ▁have ▁ ▁bullet ▁sh aped ▁front ▁and ▁others ▁have ▁a ▁stepped ▁front ▁similar ▁to ▁a ▁un ib it . ▁ ▁Com pressed ▁air ▁is ▁used ▁to ▁power ▁the ▁tool , ▁this ▁air ▁is ▁run ▁through ▁a ▁hyd ra ul ic ▁h ose ▁with ▁an ▁o iler ▁attachment ▁to ▁send ▁oil ▁through