Click on picture to see making a crab
The initial shaping of large pieces of wood is done with an electric chain saw.
An angle grinder is used for rough shaping using an Arbortech cutter, a Saburr Tooth carbide disc or a sanding disc.
The Axcaliber cutter from Axminster Power tools is similar to the Arbortech but has flat cutting plates. It is much cheaper but does the job just as well. Gloves and safety glasses are essential and a jet of wood shavings is produced that really sting!