Quick Answer: The Compass, Plastic, for Blackboard is a 40 cm compass in hard white plastic with a metal butterfly screw for adjusting tightness by hand. Its chalk holder adjusts for round and square chalk.
Last updated: October 2026
Key Features
40 cm long, hard white plastic
Metal butterfly screw to set tightness by hand
Chalk holder adjusts for round and square chalk
Interchangeable suction foot and compass point in soft plastic
Made as a classroom teaching aid
Technical Specifications
Specification
Value
Length
40 cm
Material
Hard white plastic
Adjustment
Metal butterfly screw, by hand
Chalk holder
Adjustable for round and square chalk
Foot
Interchangeable suction foot or soft plastic compass point
About This Product
A blackboard compass lets a teacher draw large circles and arcs that the whole class can see, for geometry lessons on radius, diameter and constructions. The choice of a suction foot or a point lets it be used on different board surfaces. Enquiries from Tajikistan, Timor-Leste, Morocco, Belarus and Maldives for the Compass, Plastic, for Blackboard receive an export quotation.
Frequently Asked Questions
Can the Compass, Plastic, for Blackboard hold square chalk?
Yes. The chalk holder is adjustable for both round and square chalk.
