Choker of SexyCyborg with buldog type add (pointed cones all around the choker). The neck size is editable. The choker is a bug fix and an enhancement of zeno4ever choker version for a general purpose size neck and others params like:
choker_circumference = 320;
choker_height = 20;
choker_thickness = 2;
magnet_height = 17;
magnet_diameter = 4;
The chocker change accordly to prams in an huge range.
Search into Amazon for a "magnet cylinder". In Amazon.com now I have found 30 Magnetic Pins 10mm X 4mm for $9.11: 4 mm is the magnet_diameter and 10 mm is the magnet_height. N.B. if you use two magnets one upon the other, check the poles.