840cm Diameter Adjustable Compasses Glass Circle Suction Cup Lengt 20cm

Specifications:
Glass size: Length 20cm
Item size:as the picture (approx)
Net Weight: 77g
Adaptation specifications: minimum diameter: 8 cm
Maximum diameter: 40 cm
Thickest can cut: 6-12 mm
Adsorption: sucker

Instructions:
1. First put sucker on the glass , sucker upper rotating plastic head 90 degrees, sucker suck on glass, the water will suck even more firmly.
2. While holding down the plastic suction cup on the head in one hand and hold the hard plastic head on a ruler to draw a circle out of one-off, it is best not to repeat the round draw, otherwise it will destroy the glass .
3. Then draw lines cross in the circle, the more the better.
4. Beat with a wooden mallet or small hammer inside the circle, the size of the force to hold their own, the glass within the circle will be a small piece of a small piece fell off.
5. beat to beat under the glass upward along the to beat. The first step after the draw circle, we must draw a full circle again knocking on the middle "
Precautions:
Size will be a little manual measurement error!

Product List;
1 X Compasses glass











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