PREMIUM MATERIAL: This professional compass is made from zinc alloy,making it durable,rust-proof. STRONG PRACTICALITY: Equipped with a spring chuck and a center wheel,this precision drawing compass prevents unnecessary leg movements. Additonally,the grooved compass head ensures a firm,non-slip grip that's not easy to dislodge,making it excellent for precise drawings. SCOPE OF APPLICATION: Ideal for use in schools,offices,woodworking,or even at home,this compass geometry set is a valuable tool for students,artists,mathematicians,carpenters,and those involved in woodworking,metalworking,or leatherwork. USEFUL FOR ACADEMIC LIFE: Easy to handle,this compass is designed to prevent unintentional leg movements. It doesn't slip from your hand easily,enabling you to draw a perfect circle. PRODUCT SPECIFICATION: Size: 26cm,Package Included: 1x Compasses Set. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.