Simple tools fashioned in: hard stone, bone, wood, bronze, steel, sharp blades, teeth that cut, horned edges that slice, points that prick, ropes that bind, tips that pinch, hard flat heavy weights that pound ----------------. Or moving mechanical parts:  wheels that turn, arms that swivel, blocks and tackle, tight belts, drive chains, gears that endlessly mesh, springs that tension then release, the pressure of steam, hydraulic pressure, electrical energy, intricate electronic components, these have a more corporeal and often devastating effect on matter.  - They modify the material world. 

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