The Trimming Spinner goes on the bottom of a pot or mug while trimming. A finger of the potters left hand rests in the concave centre allowing the potter to stabilise the trimming hand while trimming. The wider footprint disperses downward pressure to help prevent a thin-walled piece from collapsing. Thin, foam rubber backing grips the piece. Division guide marks in 1/2’s up to 1/9th’s allows a potter or hand-builder quick reference for easily marking and dividing the piece into sections. A string or fishing line can be looped through the centre hole and pulled/hung to mark lines down the side of a piece, in lieu of a laser. Use all appropriate safety precautions.