GearWrench® files are made from tool grade steel for strength and durability. They feature dual material ergonomic handle for added comfort and durability. The 82820 is a four piece set consisting of 8 in bastard files in flat, round, half round and triangle which are meant for deburring, rounding and material removal. Set come in a plastic storage tray for safe keeping and improved organization. GearWrench® File Set, Standard, 4 Piece, 7 in Length of Cut, Bastard Cut, Ergonomic Handle