These are double-threat tools. You can use them as pin punches (always handy around the shop) or you can grind them to make small chisels, gouges, or special scrapers for your lathe.
Although inexpensive, these are not cheaply made. They have hard tips to prevent deformation, but shanks that are tempered to withstand hammer blows (most pin punches are batch hardened, which compromises both these features).
Made of chrome vanadium steel. Slightly undersize, diameters are 1/8", 3/16", 1/4", 5/16" and 3/8". 5" to 6" long. Good value.