Magnepull XP1000-LC-L Wire Fishing System w/In-line LED Lighted Tapered Magnet Light give a visual path - if there no installation in the wall or sealing Visual warning before the magnet pops thru the wall opening XP Tapered Magnets has 25% more magnetic strength & the tapered bullet gives it less drag Paired up w/ XP Retriever, Rolling Magnetic it has 30% more pulling strength Bullet Drop Magnet 1- 3/4" L, Diameter .70", Fits 3/4" Hole - Overall length 15" w/LED/Light, American Engineered, Assembled in the USA using & Global Components