Woodworking awl or carpentry scratch awl is simple and important tool for marking.
Most common way to use awl is to make indentations in wood and other constract materials. This is especialy helps for position drill bits, screws, nails and other tools and fastening.
Next way is to scratch the line on pice of material for further work with saw, hand planes or othe cuting tool.
Awls by Petrograd toolworks comes in tree variations: awl for heavy duty, long and thin awl, and awls with T-handle.