Extension bar of layered ultra high modulus carbon for improved strength and torsional rigidity Increased windage adjustment provided by #10-32" screw (vs standard #6-32) Wedge lock attachment knob mounts your sight securely, with large area of contact with the sight bar Simple, click on/off locking on windage and elevation prevents movement and unintentional adjustment Adjustment knobs designed for ease and comfort of use - even in challenging weather conditions Selection of most popular metal sight tapes included