The design of this sight ensures tight clamping to your rifle without the risk of the clamp failing or the sight coming loose. Convenient coin slot included for easier tightening without fumbling for tools. Along with the other products in the range the days of your clamp failing in the middle of a shoot or losing your zero when reversing your sight to change glare tubes are gone!Specifications:Material: High-grade anodised aluminiumDove tail: Standard 1/2 inch