Specs: 3/8"--3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4. 1/4"--3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16. 3/8"--10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm. 1/4"--5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm.