Features: 12-edged flanktraction profile according to DIN 3124 / ISO 2725-1 inner square according to DIN 3120 / ISO 1174 with ball groove for manual actuation high gloss chrome-plated chrome vanadium technical data: drive size: 28square drive: 3/4 inch external 12 edge: 28 mm diameter: 36.0 mm weight: 245 g total length: 63.0 mm material: fine chrome-plated vanadium steel, matte finish ISO 117 mm