1lb Painted Metal Inertia Ball with 3 Eye Bolts Type_Cross-Sectional Short 150mm red 2mm-stackable lead

Short 150mm red 2mm-stackable lead with nickel-plated pins on both ends

housed in a vinyl-covered zinc steel case

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

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

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

1lb Painted Metal Inertia Ball with 3 Eye Bolts Type_Cross-Sectional Short 150mm red 2mm-stackable leadOne 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.