CBE Tek-Hybrid Pro Hunting Sight-5 Pin-RH-.010 Fully machined aluminum construction Armed Guard Fiber Management System for even brighter pins and better protection; with 12" of fiber Ergonomic, oversized 4-point Rapid Drive knob for a sure, easy grip Stay Tight design Delrin tracks assure sight stays tight, quiet, and rattle free, even over time; adjustable tension Stainless steel bolts - no more rusting