COMPREHENSIVE SOCKET SIZES: The set includes a full range of deep sockets: 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 17mm, 18mm, 19mm, and 21mm. Perfect for accessing tight spaces. CLEAR EMBOSSED MARKINGS: Utilizing the latest embossed technology, these sockets are easily identifiable even in cluttered toolboxes.