Material: Constructed of M2 HSS with strict heat-treatment to enable high hardness and tensile to keep long cutting life to drill vary wood material. Tip Design: The 135-degree standard tip design not only promises strong sharpness, but also prevents slippage and makes drilling stable and precise. Smaller bits like this are much more rigid, and will not flex like long Bits. 5pcs Short Bit Set Sizes: 3/32, 1/8, 3/16, 1/4, 5/16-inch which meet your different drilling requirement. total length: 2.36/60mm. Easy to use light, compact and durable. Work Great in Tight Spaces: These Handy little stubby bits are perfect for use in your right-angle drill/driver, which has a 1/4" hex chuck on it. The short length allowed installation in a very tight area, perfect size for right-angle drill attachment Wide Application: Perfect for wood, plastic and soft metal such as aluminum, thin steel plate etc. NOTE: NOT FOR Thicker Metal