The RYOBI 4 in. Auger Bit is ideal for light cultivating, and making holes for small plants, bushes, or metal fence posts. This bit has a durable powdercoat finish to prevent paint chipping and corrosion. The 8mm quick connect allows you to quickly remove or install the bit when needed. The 4 in. auger bit is compatible with the RYOBI 18-Volt Auger P2930 and the RYOBI 40-Volt Auger RY40710.