MAXBIT designed this 25-inch extension for use with their Garden Hole Digging Drill Bits. This extension features a powder-coated steel construction. It works with either the 4-inch or 6-inch bit and includes all the hardware needed for installation. The MAXBIT 25-Inch Extension allows you to dig planting holes from a standing position. It fits any 3/8-inch drill; however, MAXBIT recommends using an 18-volt or higher drill. The MAXBIT Extension eliminates stooping and bending. Use it to save your back during long planting sessions. You can also save some cash by purchasing the MAXBIT Garden Hole Digging Drill Bit Kit. This kit combines a 4-inch bit, a 6-inch bit, and an extension. MAXBIT proudly makes all its products right here in the USA!