Two holes Feeder Clamp 1.It is for 1/4",3/8", 1/2", 7/8", 1-1/4", 1-5/8", 2-1/4" jumper cable 2.Install quickly Two holes Feeder Clamp1.It is for 1/4" jumper cable2.It is for 3/8"" jumper cable3.It is for 1/2" jumper cable4.It is for 1-1/4" jumper cable5.It is for 2-1/4" jumper cable6.It is for7/8" jumper cable7.It is for 1-5/8" jumper cable8.Install quickly