These Duraspin #2 replacement bits give users a sense of security, knowing that high-quality bit replacements are available when they become necessary. The (4) EA301 #2 square bits measure 7.75 inches long and work with Duraspin DS312-18V and DS332-AC models. The (4) EA0300 #2 Phillips bits are 7.75 inches in length and work with models DS312-18V and DS332-AC. All (8) bits are made of durable steel to withstand challenging applications.