It is a Blackhawk by Proto 6 Piece Magnetic Nutsetter Set - SAE
It is a Magnetic fractional nutsetter
It contains sizes 5/16 through 3/8

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 3.8 inch
Height : 1 inch
Length : 4.5 inch

Item Weight: 10.4 ounce (View shipping rates and policies)
Shipping Weight: 10.4 ounce (View shipping rates and policies)

ASIN : B00D05CH08