Smaller and thinner head form with a flat back side. The weight has been distributed to the sweetspot, so you actually can't afford any mishits. Also called muscle back irons and wedges. CAST IRONS ...
Muscle back iron - features a smooth backside and limited perimeter weighting Muscle memory - repetitive practice of a specific body movement until your muscles memorize the motion.
Example: Muscle back irons were more popular in the 1970's than they are now. muscle memory a phrase referring to the nervous system's ability to memorize, or perform automatically, a well rehearsed motion ...
See also: Side, Swing, Flat, Form, Golf
 
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