The drill bit extension kit is compatible to most drill bit extension insert and power bits. All of your needs such as screws, nuts, drills, handheld drivers and construction can work with our bit extension sets. Made from high carbon steel, smooth surface, not easy to rust or stain, , will not scratch hands when you use it, safe and convenient. Features -Color:Silver -Material:High carbon steel -Size:30.00X1.20X1.20cm/11.79X0.47X0.47in -With compact shape, lightweight and portable, take up no space and you can put it anywhere. -It is suitable for hard-to-reach bolts screws and help you take less time and efforts to complete your task. -Saving you . Whether you are a novice or a skilled worker, you can use it nicely. -The durable high-carbon steel drill bit extender, nice rust resistance, and suitable for use with wood spade bits. -The drill bit extender can be as a cool and practical present for , husband, father or grandfather. Package list: 1 x 150MM drill bit extender 1 x 300MM drill bit extender 2 x wrenches