Counted crochet tool set includes 12 pieces of aluminum interchangeable head hooks, hook sizes from 2.0mm - 8.0mm, crochet hooks are available in sizes, equipped with a wrench for easy use and will not cause the hooks to fall off , and easy to remove. The metal head is durable and very strong for long-term use. Crochet set with LED light and 3 push button switches. Press the ' button so the LED will , press the 'S' button for each to increase the number of stitches, and hold the S button to decrease the number of stitches. Repeat the above steps to the "R" button to change the number of rows. Displaying quantities makes knitting easier . he crochet set has built-in lithium battery, which is rechargeable and reusable. The battery lasts 7-9 hours after being fully in 15 minutes, and the crochet hook is only 0.7 ounces (approximately 0.7 liters), and ergonomic. Just click the light switch on the handle, the hook hook will , you can knit in the dark, it can protect your eyes well. The crochet hooks use metal crochet hooks, which are reusable, more durable than plastic crochet hooks, have a longer service life, and will not harm the wool, and you will get 12 replaceable crochet hooks. Crochet Needle Specifications: Crochet Hooks Size: 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm, 7.0mm, 8.0mm. material: metal Color as shown Package Contents: 1 x Crochet Hook 1 x Wrench 1 x USB Charging Cable 1 x Case 12 x Interchangeable Hook 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.