Double-ended, 16mm & 21mm single Hex (6pt) spark plug spanner. 305mm long. Outside diameter: 22.2mm; inside depth: 10.1mm. Long reach tool for deep-seated spark plugs. Detachable L-bar for extra leverage; bar length: 155mm, bar diameter: 6.7mm. T-bar spark plug spanners also available, please see Laser Part Nos. 0246 (16mm), 5908 (18mm) & 0247 (21mm).