Tools 6 Piece combination square drive adaptor set Sealed. Set contains the following. TA3 1/4 drive square drive adaptor. A2A 3/8 drive square drive adaptor. GLA12B 1/2 drive square drive adaptor. GFAT1E 1/4 drive square drive adaptor. GLAS1F 3/4 drive square drive adaptor. All in a sealed magnetic case.