Features: hexagonal in accordance with DIN 3124 / ISO 2725-1Internal square in accordance with DIN 3120 / ISO 1174 with ball groove, spark free explosion protected, corrosion resistant, wear-resistant aluminium bronze (non-iron alloy), technical data: key width (mm): 26square drive: 25312, profile diameter: 36.0 mm, weight: 433 g, total length of chrome-plated DIN 1170, material: DIN standard