The amazing thing about these wrenches is that the open end actually ratchets! No need to reposition with every stroke, both box end and open end are ratcheting. 8 piece set in sizes: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, and 3/4. 3 lbs (1.5Kg) shipping weight.