Two shapes of magnets - Dual-Shape Magnets can pass through the holes of different sizes. magnets can quickly jump over water pipe obstacles , This innovative lead-pull design allows the cable to smoothly pass through enclosed spaces, insulation and other obstacles, and then pull the cable from the floor to the access point.perfect cable routing tool - It is convenient for electricians to use this , They can browse cables under wooden stud walls, panel walls, plasterboard walls, and even steel structure walls, floors and carpets. Hold tightly,can circumvent 20-foot-high obstacles.Innovative Cable Running Tool - The wire puller is combined by magnetic leader set and 20 feet nylon rope.Compared with fish tape, Magnetic Wire Puller can electricians with complete control and flexibility.Perfect Cable Fishing Tools - When you need to rewire to replace the old line, Magnetic Wire Puller is an perfect tool for installers. It can quickly pass through the wall from the pipe without damaging the surface structure of the too much.Easy to use for any DIY project, no professional training required. perfect Tool Installers,It is an technical gift for birthdays, 's Day, Father's Day, Christmas stockings, Thanksgiving, etc.size:7x7cmMaterial:nyloncolour:BlackPackage Contents:1 x Wiremag PullerOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.