Application: Three way cube corner connector is used for all 2020 series v-slot aluminum extrusions profile. Function: Create connections between aluminum profiles in almost any configuration, 7mm holes accept eccentric spacers to add adjustable V-wheels for linear movement systems. Widely used: 2020 series aluminum profile connector widely used for the construction of industrial aluminium frame structures, 3D printers, CNC routers, CNC laser cutters, CNC plasma cutters, robotics projects, 3D carvers, machine protection, etc. Cube corner connector: Three way cube corner connector are used to connect two V-groove linear guides to achieve a 90 degree connection. Material: Made of aluminum alloy, high hardness and a long service life., Weight: 0.1322773572 Pounds, Manufacturer: EMSea