Quick Set Bow Compass with 2 knee-joints. 
Retightenable knee-joints The 2 knee-joints can be retightened by using a screwdriver if needed. 
The rapid adjustment can be done by the 2 levers. 
The fine adjustment can be done by using the centre-wheel. Set contains: spare leads. 
Technical details: interchangeable lead insert (pivot: Ø 4.0mm) 
length: 170mm
maximum circle diameter: 320mm. 
Made in EU
What’s in the ...box1 x Quick Set Bow Compass