Ideal for climbing lengthy ladders and towers. Incorporates external counterweight to keep cable under tension. Counterweight includes runaway brake for added safety. No limit to length of system for ultimate flexibility. Durable aluminum housing and steel drum for durability and corrosion resistance. System requires safety block assembly, cable assembly, mounting bracket assembly, counterweight assembly and cross-over style full-body harness. Meets or exceeds all applicable OSHA regulations and ANSI standards.