Features: Sturdy removable expansion anchors designs for water drill holes provide load bearing capacity and secure fastening on various materials, ideal for repeat use in craft and professional projects. Engineered with drilling specific diameter to prevent loosening, these carbon steel bolts ensures easy installation and enhances safety during water drilling applications. For homeowners, contractors, and craftsmen seek reusable fasteners for both household repairs and industrial construction tasks. Effortlessly installion shelves, fixtures, or equipment in concrete, brick, or masonry wall during home renovations, commercial setups, or outdoor installations. Builts with corrosions resistant carbon steel and a user friendly designs, these expansion bolts eliminate tool hassles while delivering long time structural support. Specifications: Materials: Carbon Steel Type: As Picture Show, Three Type to Choose Size: Total Length 17cm/6.69inch, 16.50cm/6.5inch, 17cm/6.69inch Package Includes: 1pc Expansion Screw note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.