Construction tools and architecture icons in black outline

A clean white background presents four simple black line icons arranged in a balanced grid. A hammer, hard hat, tower crane, and rolled architectural blueprint suggest construction, building, and engineering themes. The drawings use bold outlines with plenty of negative space, giving the composition a crisp vector look that works well for signage, presentations, or web design. Each symbol is isolated and evenly spaced, making the set easy to crop or reuse in a layout. The minimal style keeps attention on the subject matter rather than decorative detail. With no color or texture distractions, the image feels practical and modern, suited to industry, safety, and planning concepts.