Package includes: spring kit N078434 and N089668 steel balls Model: N078434 N089668 Compatible models: DCF885B Type1, DCF885B Type2, DCF885B-B3 Type1, DCF885B-B3 Type2, DCF885C2 Type1, DCF885C2 Type2, DCF885L1 Type5, DCF885L2 Type1, DCF885M2 Type2, DCF886B Type1, DCF886B Type2, DCF886B Type3, DCF886B Type4, DCF886B Type5, DCF886B Type6 This is part of an impact driver bit holder system that helps hold the raw bit in place after inserting it into the bit holder