The tools needed for cutting the blocks are the following:
1. THE KNIFE
Fig. 3.—Drawing of the knife.
With this knife the most important and delicate work is done. All the lines of the key-block as well as the boundaries of the colour masses are cut with it, before the removal of intervening spaces.
The blade lies in a slot and is held tight by the tapered ferrule. This can be pulled off by hand and the blade lengthened by pulling it forward in the slot.
2. CHISELS
These are used for removing the wood between the cut lines or colour masses, and should be ordinary carvers' chisels of the following sizes:
