Superiority: Compared to older models (98 screwdriver bits versus 81 models), we offer 114 screwdriver bits and 115 models, with 34 bits added to meet more requirements. Material: S2 steel, stronger and more durable. Improvements: Screwdriver head: We have increased the length by 30% to help you achieve this. Manipulate screws deep within your equipment. We invented the faucet screwdriver bit to solve the rust problem. Application: Ideal for repairing laptops, mobile devices, and other precision items such as watches and glasses. Smart and easy-to-use tools to carry. The unique design also prevents the loss of parts. Color: red Drill material: S2 steel Quantity: 135 pieces. Box dimensions: 17.5 x 10.5 x 6 cm.