The FatMax 25' Magnetic Tape Measure has a powerful magnet that holds the tape in place when working with metal such as pipes, steel beams, ducts, and more. Itis an especially convenient solution for electricians, plumbers, machine shop workers, steel framers and general contractors. The Tru-Zero magnetic hook measures accurate every time. Features an 11' blade standout for reach and ease of use. A BladeArmor Coating extends blade life. Three-rivet, corrosion-resistant end hook provides accurate measurements. SlideLock technology holds the blade securely in position. There are 16" and 19.2" stud center markings to simplify framing jobs.