Item description from the sellerItem description from the seller
9mm - 10mm - 11mm - 12mm - 13mm - 14mm - 15mm. Made From Heat Treated Hardened And Tempered. With 6 Sides (HEX SHAPE). Full Set Is Made From - Heat Treated Hardened & Tempered -. 4mm To 15 mm. 4mm - 4.5mm - 5mm - 5.5mm - 6mm - 7mm - 8mm.