The Pentagon has signed a deal to sell nearly $700 million worth of smart bombs to Turkey as tensions are escalating between Ankara and the Kurdistan Workers’ Party (PKK) militants in northern Iraq, Press TV reports.

“The deal came timely, as we are deeply engaged in asymmetrical warfare and need smart bombs,” a Turkish military official said.

The Pentagon granted the contract to Ellwood National Forge and General Dynamics Ordnance and Tactical Systems for the sale of BLU-109 bunker busting bomb bodies and components, the first reported sale of such bombs to Turkey. Ankara expects the transaction to be completed by 2020.

Based on reports, BLU-109 bombs have been in the Pentagon’s inventory since 1985 and are said to have been used on militants in Iraq and Afghanistan.

The bomb contains 550 pounds of high explosive Tritonal, a combination of 80% TNT and 20% aluminum powder. The BLU-109’s tail fuse delays the bomb’s detonation until the bomb has penetrated the targeted bunker, ensuring complete destruction.