Bow compass YATO YT-72106, steel, length 150 mm, black/grey

YATO YT-72106 bow compass is a 150 mm steel drafting and marking tool designed for drawing circles and transferring measurements on paper, cardboard and thin sheet materials. The compass has a rigid steel frame with a black and grey finish that provides stable operation and accurate radius setting. Supplied as a single-piece instrument suitable for workshop, school, technical drawing and general marking tasks where repeatable, precise arcs are required.

Advantages

The steel construction ensures durability and consistent dimensional stability during use, while the bow design allows fine control of the pivot and scribe points for accurate circles and arcs. The compact 150 mm length makes the tool convenient for detailed work and transport, and the contrasting black/grey finish improves visibility of settings and contact points. The tool is lightweight enough for routine drafting yet rigid enough to maintain set radii.

Suitable for

• Technical drawing and geometry exercises
• Drafting on paper and cardboard
• Marking circles and arcs on thin sheet materials
• School use and vocational workshops

Key specifications

• Material: steel body for structural rigidity
• Maximum span (length): 150 mm for medium-radius work
• Finish: black and grey surface treatment for improved visibility
• Design: bow compass style for fine adjustment and control
• Intended media: paper, cardboard, thin sheet materials

How to use

Set the compass to the required radius by adjusting the legs until the distance between the pivot and the scribe point matches the intended measurement. Place the pivot point firmly at the circle centre and rotate the scribe around the pivot keeping steady, even pressure to produce a clean line. For marking on thin sheet materials, ensure the scribe point is appropriate for the material and use light, controlled strokes to avoid deformation. After use, close the legs to protect the points and store the compass in a dry place.

Usage recommendations

Use a firm, stable surface for drafting and, when working on sheet materials, clamp the workpiece to prevent movement. Check point sharpness before use and replace or resharpen the scribe if lines are faint. For teaching or repetitive tasks, consider pairing the compass with a small ruler or protractor to speed up layout and ensure consistency.