"Wards"

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Economical pulley for simple machine experiments.

Bench mounted aluminum pulley.

Pulley attached to universal clamp.

Pulley with metal clamp attached.

Plastic pulley with two- part aluminum frame.

Pulley with universal clamp for variety of surfaces.

Plastic pulley with metal clamp, includes knob for tightening.

Iron bob with hook for pendulum attachment.

Aluminum pendulum clamp with screw clamps for attaching to rods.