pocket abacus

Step 3 Drill

Remove the back of the frame along with backing and glass, then measure the inside opening dimension. We'll use this dimension to space our columns and cut the bar that divide the top and bottom decks of beads.

dividing bar:
Cut the paint stick to the the same dimension as the opening, trim stick to suit frame.

column spacing:
Select a drill bit that is about the same size as the wire used, then drill at even increments for the columns.
^{(here's an instructable on how to drill small precise holes)}

for reference:
Your frame may differ, but from the materials I found here's the dimensions.
frame measurement:      10cm x 7cm (4" x 2.8")
opening measurement:   7.5cm (3")
accounting for gap required between rows ~5mm o.c = 14 rows (14 / 7.5 = 5.35)