The positions on a modern driver's or fairway wood's adapter sleeve that let you change loft, lie, and effective face angle with a torque wrench instead of a new club. Most systems move in small steps across a range of a degree or two — Titleist's SureFit is typical, pairing a four-position sleeve with a four-position ring for 16 combinations in 0.75° increments. The trades are linked: adding loft effectively closes the face slightly (draw bias, higher flight), reducing it opens the face (fade bias, lower flight). The honest way to pick a setting is data, not the sticker — change one notch, hit a handful on the launch monitor, and watch launch angle and spin move.