The Durandal is an anti-runway penetration bomb developed by the French company Matra (now MBDA), designed to destroy airport runways and exported to several countries. A simple crater in a runway could be filled in without issue, so the Durandal uses two explosions to displace the concrete slabs of a runway, thus making the damage to the runway far more difficult to repair. The bomb is named after a mythical medieval French sword.

Designed to be dropped from low altitudes, the bomb's fall is slowed by a parachute. The maximum release speed is 550 knots (1,020 km/h; 630 mph) and the minimum release altitude is 200 feet (61 m). When the bomb has reached a 40° angle due to the parachute's drag, it fires a rocket booster that accelerates it into the runway surface. The 100-kilogram (220 lb) primary charge explodes after the weapon has penetrated the concrete and drives the secondary charge even deeper. The 15-kilogram (33 lb) secondary charge then explodes after a one-second delay. Later production weapons have a programmable fuse that can delay the secondary detonation up to several hours.

The weapon can penetrate up to 40 centimetres (16 in) of concrete, and creates a crater 2 metres (6 ft 7 in) deep and approximately 5 metres (16 ft) in diameter. In addition, concrete slabs around the crater are disturbed in an area approximately 15 metres (49 ft) in diameter. The disturbed slabs are displaced up to 50 centimetres (20 in) above the original surface, making repair more difficult than the simple crater from a conventional bomb