Features: Made of high-carbon steel strong and light, easy to store short drill posts, lock them on backpacks, pants, tool boxes 1/4 bit holder of 5pcs pack can be convenient for daily use Change bit with one hand, quick and easy. And is fixed in place by the screw locking on the carabiner, which is firm and not easy to lose. Hex shank screw driver bit holder has the function of easy installation and quick release. The keychain extension in different colors can carry the most commonly used bit , and with different colors is easy to pick out the right tool from bag or box Package Includes: 5PCS x Keychain Post Bit Holder Specifications: Material: High-Carbon Steel Quantity: 5PCS/Set Colors: As Pictures Keychain Post Length:approx 52mm/ 2.05in Keychain Post Diameter approx 15mm/ 0.59in Carabiner: approx 78x41mm/3.07x1.61in note: 1. Due to the light and screen Difference, the item color may be slightly different from the pictures. 2. Please allow 0.5-2cm difference due to manual measurement.