CTK Precision AI Monopod Compatible with Accuracy International (AI) AE, AW and AICS Chassis Systems. Cam locking 1st stage gets you on target in seconds. Fine tune elevation with threaded 2nd stage. Posi-Lock System ensures maximum stability. CNC Machined from billet 6061 aluminum for strength and low weight. Durable MilSpec anodized finish. Made in the USA!