The Klein Tools 66080 Penta Hex Flip Socket with Adapter is an optimal tool for tradesmen. The 13/16 in. Penta and 3/4 in. Hex Flip Socket combines two of the most common socket sizes into one tool. The Klein Tools 66080 socket is designed for use with an impact driver. The 1/2 in. to 1/2 in. square adapter includes a ball detent to help prevent unintentional separation from the socket. Users are able to quickly change between Penta and Hex socket sizes with the flip feature.