Loft: The angle of the clubface that controls trajectory and affects distance
Lie: The angle from the shaft to the ground line when the club is measured in normal playing position.
Offset: The distance from the forward most point of the hosel to the leading edge of the blade. Offset will help a player to align the club face with the target, reducing a slice, and may produce higher ball flight
Face (or Blade): The striking face of an iron head.
Face Angle: Position of the club face relative to the intended line of ball flight. For right-handed golfers, a square face angle aligns directly at the target; an open face aligns to the right, while a closed face aligns left.
Face Insert: An epoxy, graphite or fibrous material in the center portion of the face on a wooden, composite, or metal head.
Inset Hosel: A club design with the hosel toward the center of the club face in an attempt to reduce head twisting.
Alloy: Any combination of metals used to produce a club head or shaft. Alloys may contain aluminum, steel, beryllium, nickel, copper, titanium, or other metals in varying combinations. Less than honest descriptions of products often have the term "alloy" in them to hide the fact that the product may only contain trace elements of the desired metal. For example, "titanium alloy" may actually contains 98% aluminum and only 2% titanium which may be used to confuse the consumer with "real titanium" that has high levels of titanium. Alloy is often a code word for substituting a cheap metal for an expensive metal.
Graphite: Synthetic filament material used for shaft and head production, produced through a series of heating steps. Graphite fibers may differ greatly in strength and modulus
Titanium: Club head metal primarily for woods with a higher strength-to-weight ratio than most steel alloys. See also Forged Titanium and 6-4 Titanium.
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