The Seco 0.7-Meter Quick Change TLV Aluminum Prism Pole 5527-11 is ideal for mounting GPS, robotic, or total station surveying instruments. This prism pole features a solid red outer pole with a silver inner pole that extends to 0.7 meters and collapses to 0.5 meters. You can easily lock this adjustable section in place with the soft, rubber, twist knob on the side of the prism pole. And on the opposite side of the twist knob lock, a level vial with 40-minute sensitivity is built-in for quick and convenient reference. This compact prism pole offers metric graduations in centimeters on its inner pole as well as a 5/8 x 11-inch thread on the included adapter. Constructed entirely of wear-resistant aluminum, surveying professionals can expect nothing but reliability and precision from this prism pole.