- - what George said but be careful that you know what size checkering you are going to do; 18 lines per inch means you buy the tools for that size and do not mix them with 20/22/24 line tools. Also, you will need a bright light and a stock holder so the surface can be rotated as you move down the lines. IOW (in other words) move your gunstock and not your body. All checkering takes place after the stock is completely finished with all that nice varnish/oil on the wood and dry. A well checkered stock looks wonderful and gives you a great grip on the wood. Good luck.