Professional 4-piece radius gauge set crafted from rust-resistant stainless steel. Features dual-function leaves for measuring both convex and concave surfaces. Clear numerical markings enable quick identification of R0.3-1.5, R1-6.5, R7-14.5, and R15-25 ranges. Essential measuring tool for machinists, metalworkers, and quality control professionals. Compact 7cm design with precision-engineered edges ensures accurate radius verification. Includes four gauges with complete measurement coverage from 0.3mm to 25mm. Silver-finished surface provides corrosion resistance in workshop environments. Ergonomic 270g weight balance enhances handling during extended use. Package contains four distinct gauges matching specified measurement ranges. Manufacturing tolerance maintained within 1-3mm for industrial accuracy standards.