EASY MOVEMENT: This string line level features snag-free open hooks that are reversed for a positive hold and an easy movement on the mason line string & filament lines. molded plastic body with durable high-impact end hooks. EASY READING: The bubble leveler tool has a durable impact-resistant vial with high visibility tinted liquid for clear readings and results effortlessly. Spirit Level bottom hollow design for all-around observation. COMPOSITE CONSTRUCTION: construction reduces line sag. Easy-carry pocket clip will guard against tool loss. The highly visible coating allows you to check your line even on the brightest of days. V-GROOVE DESIGN: V-shaped groove on the small spirit level base provides stable mounting on round items like pipes or conduits. The flat bottom is used as a surface leveling tool. WIDE APPLICATION: Pocket string leveler is perfect for masonry projects, landscape projects, picture hanging, yard fence installation, leveling, etc. Material: plastic colour: red Package Contents: 9 x line level Only the above package content, other products are not included. Note: Light reflection 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.