6 Pack Tajima PZB-400 Plumb-Rite Plumb bob setter with quick stabilizing 14 oz. bob Universal plumb bob setter with commercial-grade 14 oz. bob Setting pin for wood and drywall surfaces, strong magnet for steel frames Adjustable hook ratchets to cinch onto beams or hook onto nails or studs Braided nylon line extends and holds at lengths up to 14  ft., retracts into case automatically Internal "flush pin" for zero distance measurements with plumb line flush with surface.