The Siegen 20 Piece Combination and Offset Spanner Set provides a comprehensive metric spanner solution in a convenient foam module tray format. This professional spanner set combines 12 combination spanners and 8 deep offset spanners, covering the most commonly used sizes for automotive, engineering and general mechanical work. Organised in a durable foam storage tray measuring 510 x 270 x 40mm, this set integrates seamlessly into compatible tool chest systems, keeping spanners secure and instantly accessible. The combination spanners range from 8mm to 19mm in single-size increments, whilst the deep offset spanners cover 6mm through to 22mm in double-ended configuration. This comprehensive size range ensures you have the right spanner for most fastening tasks encountered in professional workshops and mobile service environments. The deep offset design of the ring spanners provides enhanced access in confined spaces where conventional spanners cannot reach, making this set particularly