Measurement FunctionSuitable for decoration, carpentry, wall building, construction sites and other scenes. This magnetic plumb bob line kit is used to accurately mark vertical lines on walls before wallpapering, fixing pipework or hanging a cabinet. Complete AccessoriesPlumbob with string includes positioning pins for wood/drywall, strong magnets for steel surfaces, and hooks for nails or studs. The locator wrapped in elastic material provides additional drop protection and a firm handle. Automatic TelescopingPlumb bobs retractable , through resistance adjustment, it can adapt to different specifications of plumb bob, and can ensure that the balance can be quickly maintained.Just lift the construction plumb and the line will retract automatically. Easy to UseFix the pendant on the highest end of the measured object, pull down the pendant; lightly touch the plumb with your hand to make it still; measure at least the distance between the upper, middle and lower points, take the maximum value as the judgment mark, and read the judgment value " Parameters". Easy to AdjustAdopting high quality plastic shell and steel hammer with stable performance, and the magnetic plumb bob can be adjustable ranging for different construction situations.Internal flush pin for zero distance measurements with plumb line flush with surface. Material: carbon steel Cable length: 4.5m Weight: 310g Packing size: 20*12*3cm Packing list:1 x 4.5m Plumb Bob Setter.Items from Sheng Xinshun's shop