Flexibility: The flexible drill extension has a soft metal hose, it can be bent, twisted or rotated in different directions. It is a great choice for reaching narrow spaces. 3 Different Sizes: The package includes 4 drill extensions. The first one is a 20cm silver rod, the second one is a 30cm silver rod, the third and fourth ones are 29.46cm, one is black and the other is red. Usage: This drill rod is mainly used for small corners and other places that are difficult for the screwdriver to reach, such as computer chassis, electrical cabinets, furniture, electrical appliances, etc. Safe and durable: The soft rod is made of high-carbon steel, which is practical and durable, the flexible casing protects your hands, while the inner rod rotates freely. Fit drills perfectly: The 6.35mm hex shank fits drills well, it is suitable for ordinary electric drills.