characteristic: Includes 44pcsCR-V batch head (25mm), 9pcsHSS ground twist drill and 1pc1/4 inch batch head extension rod (60mm) to meet daily use requirements. The batch head and drill bit are made of high quality metal, which is durable. High-torque extended batch head counteracts part of reaction force and reduces loss. Equipped with plastic storage box, small size, no space, easy to carry. The storage box can be hung for storage, which is convenient for storage. describe Name: screwdriver head combination set Material: Metal colour: As Shown Package Contents: 1 x Screwdriver bit combination set 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.