Profile connection is one of the use of accessories.It can be directly into the aluminum slot hole in any of the assembly point.It is used for T-slot aluminum extrusions to attach different parts and connected together with T screw or others.T-Slot nuts enable the consumer to add clamps to a fixture without tearing down current clamps.Color:silvermaterial:metal Size:30mmSpecification:M6Package Contents:10*T-sliderOnly the above package content, other products aren't included.Note: Light shooting and various reveals could cause the color of the object in the photograph somewhat varied from the real thing. The measurement allowed error is +/- 1-3cm.