1,25in Dovetail Plate: Dovetail plate allows you to connect multiple accessories including telescope rings, telescopes, and cameras. It can also be used for attaching telescopes with tripod adapters. 2,Dovetail Plate Function: The dovetail plate provides a platform for attaching telescope optical devices to an equatorial mount, and for securely attaching an oscilloscope to an EQ mount. 3,Easy to Dismantle: The adapter is made completely oxidized and precisely manufactured from full metal alloy, and can be easily connected and dismantled without tools. 4,1 or 4in Thread: The adapter offers a threaded post for attaching instruments, such as standard photographic tripods equipped with a 1 or 4in socket. 5,Excellent Accessory: The dovetail plate is an excellent accessory for EQ mounts and DSLR or SLR cameras to take photos of the Star Road. 1 x Dovetail Plate2 x Screw2 x Turnbuckle Item Type: Dovetail PlateMaterial: Aluminum alloySize: Length 108mm or 4.25in, width of lower edge 43.4mm or 1.7in, width of front groove 15.6mm or 0.61in Characteristic: 2 1 or 4in screw holes in the middle, 1 M62 stepped screw hole on both sides Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.