This Craftsman 20 Piece Ratcheting Combination Wrench Set is the perfect addition to any toolbox. With a variety of sizes ranging from 5/16 in. 10 mm, and 7/16 in. This set is equipped to handle any job. The wrenches are made of durable alloy steel and feature a heavy-duty, reversible design for added convenience. Plus, the chrome and polished finishes give them a sleek look that will impress any user. Whether you’re working under the hood or under the sink, get the torque you need to finish the job with this Craftsman ratcheting combination wrench set. Combining 10 inch and 10 metric sizes, there’s a wrench for whatever fastener lies ahead. The reinforced open ends and ratcheting ends give you the strength needed to bust stuck bolts and turn with minimal adjustments. Includes inch sizes: 1/4″, 5/16″, 11/32″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″. Includes metric sizes: 6mm, 8mm, 10mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm. Fine-tooth ratcheting action gives you powerful turns with only a 5° arc. Open end delivers torque and grabs bolts quickly. Made of an alloy steel to handle tough jobs. Standard & metric. 4.3, 4.4, 5.6, 6.3, 6.6, 7.2, 8.3, 8.4, 8.5, 8.9, 4.3, 4.4, 5.6, 6.3, 6.6, 7.2, 8.3, 8.4, 8.5, 8.9. SAE or Metric.