4 Sets geometry compass, metal bow compass, math drafting compass with lock, drawing with extra lead refills for office school math drawing, 9 inch in diameter

Good quality:
Made of metal, nickel plating compass, durable and can be applied for a long time; Not easy to rust, compact size, can be carried around.

Easy to carry and store:
Each set is packed in a transparent, reusable transparent bag for easy storage and carrying.

Precise compass:
Precision geometry compass with spring bow head, and center wheel prevents unintentional leg movements, can be adjusted at will; The maximum diameter of the drawing is 4.76 inch/ 12.1 cm, providing you with precise mapping.

Wide application:
Suitable for school teaching use, good math tool set for math, geometry, art, drafting and drawing.

Specifications:
Quantity: 4 sets
Material: metal
Color: black and blue
The maximum diameter: 4.76 inch/ 12.1 cm
Pattern: as pictures shown

Package includes:
4 x Geometry compasses

Warm notice:
1.The screw may be a little tight, and not easy to turn the screw out when you change the ink pen pin at the first time; It will be easier to turn it out after changing several time.
2.Please do not adjust the diameter bigger than the maximum ones, or the compass will be broken and cannot be repaired.

Product Features

• Good material: made of metal, nickel plating compass, durable and can be applied for a long time; Not easy to rust, portable size, can be carried around
• Precise measurement: precision geometry compass with spring bow head, and center wheel prevents unintentional leg movements, can be adjusted at will; The maximum diameter of the drawing is 4.76 inch/ 12.1 cm, providing you with precise mapping
• Package content: package contains 4 sets geometry compass, each set includes 2 pieces screws, 2 piece nuts, 3 pieces lead refills; Each set is packed in a transparent bag, complete enough
• Easy to carry and store: lightweight and packaged in a clear, reusable pouch, easy to carry and store, convenient for your use
• Wide usage: suitable for school teaching use, good math tool set for math, geometry, art, drafting and drawing