Features:Complete set with 9 interchangeable heads size from 2.5mm to 6.5mm.2 Brightness levels---dim or bright suits various lighting conditions.Built-in lithium battery can be recharged and reused.It can be used as a small flashlight when it is not installed.15 minute quick charging and long lasting battery 7-9 hours. USB charging can be done by wall adapter,power bank or desktop/laptop computer etc.It comes with a stylish zip case for convenient to storage.Interchangeable heads each marked with hook sizes.Great for long or short projects for crocheters at all levels.Complete Set - Crochet Hook Size: 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm.Specifications:Handle material:ABS+SiliconeCrochet Hook material:PCCrochet Hook Sizes: 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mmColor:Black/Red/Rose RedNotes:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow slight measuring deviation due to manual measurement.Included:9 X Interchangeable Heads1 X USB Charging Cable1 X Small Wrench1 X Handle1 X Case