BONE COLLECTOR SIGHT Patented 4-pin sight. The two smaller .010 pins are for longrange shots and the two larger .019 pins are for close-in shorts. Durable stainless steel tubes protect the green ultra bright dual-end fibers. Microclick windage and elevation adjustments with locks. Lasermarked elevation, windage and pin positions. Distortion-free precision pin alignment. Large 1.8 aperture. Removable micro push-button light. Reversible bracket. Adjustable level. Glow-in-the-dark shooters ring. Toolless design. Adjustable for right or left hand.