Designed to remove damaged nuts and bolts

Made from heat treated chrome molybdenum steel

Contents: 9, 10, 11, 13, 16, 17, 19 mm, 1 pc 3/8'' adaptor

Suitable for use with 3/8'' Sq drive or spanner.1 pcs 3/8'' Dr. 1/4'' shank adaptor, make this set can be also used electric drill for

size 9, 10, 11, 13