The spiral form basket shows what can be done with a piece of 12mm plywood and a jig saw – and lots of care.

The flat form of the baskets shows how it made.  A spiral has been created, starting in the centre of the basket – its base.

The separation between the rings of the spiral is about 6mm.

A spiral is cut using the jig saw cutting at an angle.  This angle and the kerf of the jig saw blade will permit the spiral to drop until it hits the layer below.

This drop should be about half the thickness of the material used – the angle chosen will be within a few degrees of vertical.