- ABS material, 210 x 210 x 15 mm.
- One face has grids of 10 mm square with a hole of 2 mm dia x 7 mm deep.
- Corners of each square except boundary corners of the squares i.e. total squares 289. Other side four rounds with 2.5mm diameterx6mm height dowel inbuilt dia. Having 70,
110, 150,190 mm each dia. 20 dowels inbuilt in each circle and one dowel inbuilt at centre point.