1 Pack Colorful Basic Metal Math Compass for Geometry Set, Extra Leads, Mechanical Pencil Desiged, Drawing Tools Compass for Students School and Office Supplies Description: High precision drawing tools: Made of metal material, the precision gear structure ensures that Circles drawing is stable and does not deviate, meeting the technical needs of geometric drawing, engineering drawing, etc. Non slide and comfortable grip: Ergonomic handle designs, non slide rubber wrapping, long term drawing without tiring hands, especially suitable for students' classroom practice and exams. Adjustable radiuss designs: Equipped with a ruler and a fine-tuning knob, it is easy to draw a Circles with a diameter of 5cm to 30cm, meeting the needs of classroom practice, exams or technical designs. Portable storage box: All accessories are neatly stored in a special plastic box or leather pen cover, which is convenient to carry with you to avoid loss. It is suitable for students and professionals to use when going out. Widely applicable scenarios: Suitable for mathematical geometry drawing, art sketching, architectural sketching, mechanical drawing and other purposes, it is an ideal tool for students, teachers and designers. Features: Quantity: 1pcs Matter:metal Color:White,black,p-ink,blue Product size:12x2.5cm/4.72x0.98inch Packing size:14×4×2cm/5.51×1.57×0.78inch Net weight:40g/0.088lb Gross weight:40g/0.088lb Package Content: 1x Compasses set Math Compass for Geometry Set Drawing Tools Compass for Students School and Office Supplies Mechanical Pencil Desiged No Complicated Installation Procedures: You can just press the cap of the automatic pencil,you can get a match compass with leads,and will not need your extra sharpening pencil Easy to Draw a Circle: Just adjust the metal legs and press the cap of the automatic pencil to release the lead to the the appropriate length then you can get a basic geometry drawing tool