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The fixture plate
20 - Oil impregnated bronze bushings (6732271)
3/8 - 16 Screw with Grease fitting (New protective style)
The 2 that I use are shown in the pictures
Business Card jig
Solids Of Constant Width - Variety of 4 shapes Phone Stand The fixture plateSet of four Cones of constant width with one of each Triangle, Hexagon and a Heptagon and Sphere. CNC machined in Canada out of brass or aluminum bar stock. Approximately 1" in diameter. These non spherical solids amazingly have constant width in every directionallowing them to roll smoothly. They are derived from two dimensional curves that were put into use by the 19th century German engineer Franz Reuleaux.