The Siegen S0635 is a 12-piece flexi-head combination ratchet ring spanner set manufactured from chrome vanadium steel, designed for professional mechanics, engineers and technicians working in confined spaces. The set features a 72-tooth ratchet mechanism requiring only 5° rotation to pick up the next tooth, making it particularly effective in tight working environments where conventional spanners cannot achieve a full swing arc. Each spanner in this metric set combines a flexible ratchet ring head with a traditional open-ended spanner, providing versatility for different fastener access angles. The flexi-head design allows the ratchet end to pivot, enabling work around obstructions whilst maintaining constant engagement with the fastener. This dual-functionality makes the set ideal for automotive repair, machinery maintenance and general mechanical applications where access is restricted. The comprehensive size range from 8mm through to 19mm covers the most commonly encountered metri