The Signature Series with the new rounded bail design is much easier to use and with the modifications to the cylinder it will hold 10% more soil than the standard line. The new cross handle has been designed to take less effort to turn in the most difficult soils. The new weld design offers less friction for easier augering and cleaning. The new coupling makes it three times faster to connect and disassemble. The extensions are rust resistant because they are plated with a yellow zinc coating. All augers are made of high carbon steel bits with tunsten carbide hard surfaced edges, stainless steel cylinder and a carbon steel bail. The list of improvements are endless.