SBTL2000 Turnstile Swing Barrier The ZKTeco SBTL2000 single lane swing barrier turnstile is an elegant cost-effective entrance control system designed for high-traffic volume. The SBTL2000 is a single lane swing barrier turnstile series designed for smooth and silent operation and draws very little power. It’s made of stainless steel which makes SBTL2000 highly durable.