SVBONY Multi-Function Shoe Bracket This synta bracket is suitable for most kind of telescopes and has strong compatibility. Precision machined dovetail base, made of high strength aluminum with anodizing aluminium process, durable for long time use. The aluminum material makes the product lighter and easier to carry. Two thumbscrews are included in package which are fit into the recessed slotted mounting holes. The dovetail base is compatible with most finderscopes, like SV182,SV106. Features W2370A is multi-funtion dovetail slot, the width of the internal slot is 5.1mm, it can be fixed with M3-M5 screw It can be installed to: SVBONY SV48, SV48P, SV503 70/80/102ED, Celestron C8, C8HD, C925, C11HD, SKYRVER: 80ED, 102ED, 130APO, SKYRVER 100ED binoculars, and other primary mirror High-quality built; the dovetail base made of high-strength aluminum with anodizing aluminium process; is designed to accept finder scope. The dovetail base fits most bracket designs; compliable with finder scope on telescopes, so you can securely attach an aiming device to any telescope. The dovetail is easy to use; you can use thread screws to assemble it to your optical tube; the use is easy; just put it on the optical tube and tighten the screws. The dovetail slots are available in two styles, which is different in the width of the internal slot. The width of the W2370A is 4.2 mm and the W2370B is 5 mm. W2370A W2370B Technical Specifications Model W2370A W2370B Length along the 34mm 39mm Width of internal slot 4.2mm 5mm Horizontal length of internal slot 36.5mm 46mm Vertical length of internal slot 36.5mm 46mm Can be fixed M3-M4 screw M5 screw Color Black Black Weight 41g / L*W*H 45*40*25mm / In the Box SVBONY Multi-Function Dovetail, selected model : 4.2mm hole length (W2370A) 5mm hole length (W2370B) with : 1x Wrench 2x Screw Manuals & Warranty Svbony 1-Year Warranty