Warne Scope Mounts Fixed Rings Matte, High, 30 Mm Otis Technologies If versatility and speed are If versatility and speed are important features in your avalanche rescue and snow study kit (they should be) Bearing seals have a very low level of drag while retaining excellent protection qualities and keep contaminants outLow viscosity grease and optimized fill percentage hits the perfect balance between durability and minimal frictionItem SpecificationsWeight66BB Frame InterfaceBB86Spindle Interface TypeRaceFace Easton CINCHBB Shell Width86Defined ColorBlackBottom Bracket Shell I The Maxima Fixed Ring Series fit Weaver style cross slot bases and incorporate a Warne square stainless steel recoil control key in both the front and rear rings The Maxima square recoil key also protects against swaging or peening of the bases when used on softer or less durable materials