Feature:1. M42*0.75mm thread is divided into inner-ring and outer-ring double-layer structure. The camera angle can be adjusted conveniently by fixing the relative position of the inner and outer-ring with 3 screws.2. The whole is black aluminum alloy and will not fade. Do not hurt telescope thread, two-layer thickened aluminum alloy is very strong, excellent technology.3. Precise fit and solid connection, directly mount adapter and no adjustments required.4. Precision all-metal construction with close and smooth combination for secure and solid fit.5. Applicable models: for PK Mount Cameras and telescope with standard 1.25 inch eyepiece port.Spec:Condition: 100% Brand NewMaterial: Aluminium AlloyColor: BlackModel: T2-PKSize: Standard 1.25inchMount: PK Mount Thread: M42*0.75mm Suiatble for Pentax PK Mount Camera Package List: 1 * PK Mount Adapter Ring1 * 1.25inch Internal Thread Bracket