Browning Vibra-Loc Sight with Pin Guard has easily adjustable sight pins with serrated slots to keep the pins from slipping. Also, there are two slots and four color-coded pins for a full range of yardage settings. With Browning's Vibra-Loc Sight there are no wrenches required. These pins are finger tightened and will not come loose, and has a wide range of mounting adjustments. Vibra-Loc is made out of durable aluminum frame and is designed for right/left hand use.