The wood spade 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, tool box and construction can work with our wood bit extension sets, which can bring more convenience to you. Features - Color: Silver. - Material: Carbon steel. - Size: 14.80X1.20X1.20cm/5.83X0.47X0.47 inch. - Size: 29.80X1.20X1.20cm/11.71X0.47X0.47 inch. - Made of steel, the drill bit extension kit is can hold bits securely in place, convenient to use. - It sure that your bits stay in place and never wobble while in use. - It sure keep maximum control and accuracy when drilling and driving. - It is suitable for using with wood spade bits due to the nice rust resistance. - The professional and practical bit extension kit for replacing the old or broken one. Package list: 1 x 150mm Drill Bit Extension Rod 1 x 300mm Drill Bit Extension Rod 2 x Wrenches