A golfing aid 11 having two levelling sensors 32, 33 mounted on a D shaped sensor body 31 and a mounting means having three adjustable connectors 41, 51, 61 for adjusting the orientation of the D shaped sensor body 31 and an indication output in the form of spirit level bubbles 32, 33 for providing an indication of the sensed level orientation. A system of interactive adjustable connectors linked together to provide such variability that allows connection to any one of left and right handed clubs with different shaft diameters, different angle of putter shaft to putter head and different length shafts and different length putter heads to allow for substantially aligned overlying of the D shaped sensor body 31 over the putter head 23 while substantially aligning the golfing aid front face 34 correctly with the putter head front face 24.