Ring Spanner Ratchet Wrench Set, 10 pieces. This versatile set includes open-end wrenches in the most common sizes. Each wrench combines a box and an open-end wrench in a single tool, making them suitable for various applications. All wrenches are ideal for working in tight spaces, as the toothless ratchet requires only a 3-degree return angle. Made from high-quality chrome vanadium steel and featuring a hardened bi-hexagonal ring, the wrenches are robust and durable. The set includes wrenches in the following common sizes: 8, 10, 12, 13, 14, 15, 16, 17, 18, and 19 mm. The set comes in a practical half-insert that is compatible with the Bosch L-BOXX Mobility System.