Whether you are flaring Type K soft copper, or using it to “re-round” copper for use with compression fittings, the KnuckleSAVER™ flaring tool provides safety from injuries. The shank of the flaring tool is drilled out and provided with a pressure relieving hole, to allow for use with lines that cannot be shut down. Rubber hand guard protects your hand from hammer strikes, while the ribbed handle gives a good grip