1、[Chrome Vanadium Steel Material] The drill bit extension kit is made of heavy chrome vanadium steel, with high strength and hardness, and lasting durability. Comes with a black storage bag for easy storage and carrying. 2、[105 Degree Dill Attachment] 105 degree right angle drill bit extension can be connected to a drill bit, rechargeable drill or manual wrench, and extended to narrow place for flexible installation. 3、[Flexible Drill Bit Extension] Flexible drill bit extension can be bent and rotated in different angle, and can be drilled into a narrow space or various spacing for work, easy to fold and carry. 4、[Socket Adapter] Multi function adapter kit turns your electric tool, drilling tool, hand tool into a multi function nut driver, which makes the spring loaded ball bearing lock snap on the sleeve kit. With standard 1/4in shank. 5、[Screwdriver Bit Holder] Kit includes 3 pcs 1/4 inch hex shank magnetic extension screwdriver bit holders, with the length of 60mm, 100mm, 150mm respectively.