1. Fastener Division (1) Sales and installation of various types of post-installed anchors (2) Manufacturing and sales of steel materials and various hardware (3) Sales and installation of seismic-related materials (4) Design and construction of seismic-related works for buildings, etc. (5) Design and construction of seismic-related works for road and railway bridge piers, etc. (6) Sales of water-stopping materials such as poly-knit ropes and electric tools 2. Civil Engineering Materials Division (1) Sales of support materials for tunnels such as rock bolts (2) Sales of anchoring agents for rock bolts such as dry mortar (3) Sales of waterproof sheets and accessories for tunnels, as well as construction machinery such as welding machines (4) Sales and rental of construction machinery such as polyurethane injection agents for rock consolidation in tunnels and injection machines (5) Import sales, design, and construction of water-stopping sheets and waterproof sheets 3. Construction Division (1) Design and construction of environmental works such as tunnel interior works, fireproof works, and sound barrier installation works (2) Design and construction of safety facility works such as guardrail installation works and fall prevention works (3) Design and construction of refresh works such as tunnel reinforcement works and building exterior wall repair works (4) Design and construction of equipment works such as tunnel interior lighting and disaster prevention, as well as bridge-related equipment works

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