1/4 12pt. Flank socket 3/16 1/4 12pt. Flank socket 7/32 1/4 12pt. Flank socket 1/4 1/4 12pt. Flank socket 9/32 1/4 12pt. Flank socket 5/16 1/4 12pt. Flank socket 11/32 1/4 12pt. Flank socket 3/8 1/4 12pt. Flank socket 7/16 1/4 12pt. Flank socket 1/2