Vintage Snap-on box wrench, 3/8 inch size, boasting high durability. - Brand: Snap-on - Model: Box Wrench - Size: 9/16x5/8 spline - Part Number: XDES1820 - Condition: Vintage Thank you for viewing. It has been used very little and stored for a long time. Please understand that there may be minor scratches as it is not new. Because it is a spline, it is compatible with various bolt shapes (hexagonal, 12-point, 4-point, Torx, spline, etc.)