- Material and durability: Carbon steel construction with heat treatment for durability. The drill bit head is polished for high wear resistance and long life. - Set contents and storage: 11 piece Spade Drill Bit Set including sizes 1/4 inch, 3/8 inch, 1/2 inch, 9/16 inch, 5/8 inch, 3/4 inch, 7/8 inch, 1 inch, 11/4 inch, and 11/2 inch. Includes a nylon storage pouch for easy storage and organization. - Hex shank and slip resistance: 1/4 inch hex shank with groove to reduce slipping and prevent loss during use. Chip removal helps maintain smooth drilling speed. Fits the majority of brands currently on the market. - High efficiency and stability: Center positioning design enables quick and precise hole placement, enhanced stability and working performance. Hex shank is easy to clamp, non slip, and will not fall off during work. - Practical applications: Ideal for woodworking tasks such as drilling large holes in furniture and cabinets, creating cable pass‑through holes in panels, and opening passages for hardware or fittings.