SUNEX TOOLS 1 2 in. Drive Standard and Deep Metric Impact Socket Set (39 Piece) Compact Water Heater 56 Certifications and Listings UL 56 Certifications and Listings UL Listed Manufacturer Warranty 5 years Unit can be vented either vertical or horizontal termination 4 Measurement Standard Metric Number of Pieces 10 Hand Tool Type Socket Set Individual Set Set Universal Universal Socket Type Impact Socket Returnable 180 Day Socket Depth Deep Tools Product Type Hand Tool Manufacturer Warranty 1 yr The ratcheting tool allows the fastener to be rapidly tightened or loosened in small increments without disconnecting the tool from the fastener