Alnico Magnets"Mount this angle to the V-groove Linear Guide using M5x8mm Low Profile Screws and M5 T-Nuts."Product Details:1 piece/lotCompatible with 20mm V-groove linear guidesAnodized aluminumColor: Black/BlueConnect 20 series V-groove or T-slot aluminum extrusionsUsed as a tee angle connector or adjustable wheel blockMount this angle to the V-groove application using M5 8mm screws and M5 T-nuts: