1. Aluminum router table insert with 4 rings, suitable for woodworking tables. Dimensions: 235mm x 120mm x 8mm. Material: Made of aluminum alloy, our router table insert is sturdy, durable, and rust - resistant. 2. Router table insert details: - Dimensions: 235mm x 120mm x 8mm. - Hole spacing: 60 x 70mm. - Easy installation: Threaded hex wrench inserts at each corner help you easily align and adjust the router insert to the table. The convenient center hole ring can align the router so that it can be centered in the drilled hole. - Safety: By converting the router into a router table, you can perform safer and more flexible operations. It allows for precise drilling and easy installation of any router bit. - Wide usage: A multi - functional insert plate, suitable for making your own drill - milling machine, perfect for high - precision woodworking. It can be used with a sawing machine for edge cutting, grooving, and wood milling. 3. Features: - Made of aluminum alloy, easy to use and rust - resistant. - A convenient center hole ring for aligning the milling cutter so that it is centered in the drill bit hole. - Easy to drill and install any milling cutter. - Color: Black. - Material: Aluminum alloy plate + plastic rings. - Approximate dimensions: 235 x 110 x 8 mm. - Hole spacing: Approximately 60 x 70 mm. 4. Contents: - 1 router table insert blade. - 4 router blade rings (3.5 cm, 1.2 cm, 1.2 cm, 1.2 cm). - 1 set of installation screws. Thank you for purchasing our high - quality products. Have a great day!