1lb Painted Metal Inertia Ball with 3 Eye Bolts Type_Cross-Sectional sized for sustained workshop work

sized for sustained workshop work where the smaller 25W and 65W irons can't keep heavy joints flowing solder

configurable as a heavy pendulum bob or a demonstration mass for Newton's-first-law setups

this sonometer carries brass and steel wires across a 114cm wooden box with two millimetre rules

including 100 long flexible bonds for delocalized representations and crystal-lattice construction at scale

1lb Painted Metal Inertia Ball with 3 Eye Bolts Type_Cross-Sectional sized for sustained workshop workOne pound metal ball painted black with three fixed eyebolts of 3 8 inch inner diameter, configurable as a heavy pendulum bob or a demonstration mass for Newton's first law setups.