The purpose of using isolation spikes is to suspend acoustic feedback from your speakers or sub-woofer. They can be installed to separate your turntable, CD player, amplifier or other audio components from vibration. Therefore, the tones will be more focused and tighter. And, there will be much less noise to be transferred to other rooms from the floor.

Application: Set up the spikes beneath the equipment as same as the demonstration. No drill is needed. No adhesive substance is recommended, as it may influence the isolating effect.

Screw to adjust the spikes to make secure contact with the floor 
Stainless Steel material promises high specific gravity (density) 
Thread size: M8, Recommend using double-sided tape in place of screws.
Product weight: 105g/ each spike with pad 
Product height (adjustable): 36mm - 40mm (1 7/16" - 1 9/16") 
Product diameter: 35mm (1 3/8")