| CPC A63B 60/42 (2015.10) [A63B 60/46 (2015.10); A63B 53/0445 (2020.08); A63B 2209/08 (2013.01); A63B 2220/44 (2013.01)] | 20 Claims |

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1. An apparatus for affixing a sensor to a golf club face, comprising:
a substrate;
a circular wall extending from a front surface of the substrate, defining a hollow central area of the substrate;
a magnet disposed in the hollow central area of the substrate; and
one or more tabs extending from a back surface of the substrate, each including extensions configured to be inserted into and engage with one or more grooves on the golf club face or with an edge of the golf club face;
wherein an inner surface of the circular wall includes threading configured to engage with threading of an outer shell of an inertial measurement unit (IMU).
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