They spin true. The conical shape of the maple whorl puts additional weight around the rim, helping the spindle spin longer and stay more stable. A notch in the whorl helps keep your spun yarn in place. They are made in Ohio of maple and beech from domestic and international sources. The spindle is 10" long, rounded on both tips, has a 2.5" whorl, and weighs 1.8 ounces.