The tools of hunter-gatherers were primarily made of stone, wood, bone, and antler. Stone tools were crafted by chipping, flaking, and grinding to create sharp cutting edges, points, and scrapers. These stone tools were used for a variety of tasks such as hunting, butchering, scraping hides, and cutting plant materials. Wooden tools included spears, bows and arrows, digging sticks, clubs, and shelters. These were often crafted by shaping and hardening the wood through heat or pressure. Bone and antler tools were also commonly used, often as spear tips, harpoons, needles, and awls. These tools were generally sharpened and shaped by grinding, cutting, or polishing. Some hunter-gatherer groups also used materials like shells, leather, and fibers to create tools and clothing.