Made of alloy and ABS, this compact device can punch up to 3 sheets of paper at a time (paper thickness: 80g (less than equal 20lb)), and the construction ensures reliability and long-lasting service for your binding needsAdd creativity: Our package comes with 2 spiral binding machines in 2 styles, 20 binding rings in 5 bright colors, approximately 0.47 inches/12 mm in diameter, each ring can to 80 sheets, allowing you to bind Color-coordinate notes or add personality to your work or study materials, and it adapts to a of paper sizes, including Letter, A4, and A5; you can do it according to your actual needsAccurate positioning and efficient binding: Our bundling machine is equipped with 2 precise positioning posts to the accuracy of each punch, simplifying the binding process and improving your work efficiency, whether you are preparing work reports or setting study notesPORTABLE AND EASY TO CLEAN: yet sturdy, the mini hole punch is designed to be portable with hanging holes and a waste bin on the bottom that's easy to empty and clean, making it an perfect addition to your stationeryDISCOVER YOUR SIDE: Unleash your creativity and easily create DIY loose-leaf with our binder punch machine, suitable for both personal and professional useColour:White & GreenMaterial:PlasticPackage Contents:2 x Book binder machines20 x Loose leaf binding strips(Randomly mixed colors, no specification accepted)Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.