Key Features Mast Structure with Equal Pulling and Pushing Force The mast is the backbone of the drill rig. The double-out rod oil cylinder is directly connected to the mast, which reduces maintenance costs and provides equal pulling and pushing force. The UN1000 drill rig is capable of drilling upward without any modification to the mast. Both sides of the mast are fitted with wear-resistant strips, ensuring a long service life and low maintenance costs. Nitrogen Spring