The wooden lever ruler with a hook is an essential tool for middle school physics and mechanics experiments. This balance scale ruler helps students understand the principles of leverage and balance. Ideal for classroom settings, it allows for hands-on learning and practical demonstrations. The wooden construction ensures durability, while the hooked end facilitates easy attachment of weights for precise measurements. Features -Color:Yellow -Material:Wood -Size:56.00X3.50X1.00cm/22.01X1.38X0.39in -Essential for physics experiments: ideal for middle school physics mechanics experiments, this wooden lever balance ruler is a learning tool. -Convenient hook design: equipped with a hook, this balance ruler allows for easy hanging and versatile use in various experimental setups. -Practical wooden material: made from practical wood, this lever ruler ensures longevity and reliability in classroom and lab environments -Clear demonstration of balance principles: provides a straightforward and visual demonstration of balance principles, aiding in better understanding of physics concepts -Portable and easy to carry: with its compact size, this wooden lever ruler is easy to transport, making it ideal for both classroom and home use Package list: 4 x wooden lever ruler