Matador Spanners & Wrenches Double-ended open ring spanner 626704 - Matador 01000810, The Matador double-ended open ring spanner is designed for metric sizes 8 - 10 mm. It features open-end heads on both sides, suitable for tightening or loosening nuts and bolts in various mechanical applications. This spanner, also known as a wrench, is commonly used in automotive and machinery repairs. Matador 01000810 Double-Ended Spanner 8-10mm Chrome-Plated Steel