Precisely made from a solid block of aluminum, this DNZ 2-Piece Scope Mount - TC Venture, 30mm is one rugged mount that comes in your choice of three heights: low, medium, and high. This mount weighs about one-third of what a steel mount does, and it can be mounted easily with no special tools required. The hardened grade eight screws feature 4 times more threads than a conventional mount. With this configuration, there is no need to select a separate ring and base, which will become loose with regular use over time.