This comprehensive 12-piece engineering drawing instruments set is perfect for students, architects, and technical drawing enthusiasts. The set features a premium mini drafter that can be clamped to wooden boards up to 25mm thick, with a specially designed tightening knob for precise control. The adjustable sheet holder box, adjustable from 45cm to 74.5cm sizes, keeps your drawings protected and portable. The set includes professional-grade tools like a circle template (14.3cm), set squares (29cm x 12.5cm and 28cm x 14cm), and a 15cm scale for accurate measurements. The mechanical pencil with 0.7mm lead ensures crisp, precise lines, while the included board clips, eraser, and sharpener complete your drawing toolkit. The drafter's 52cm length provides excellent reach and stability. All instruments are crafted for durability and precision, making this set an essential companion for technical drawing and engineering projects.