SERIOUS STEEL FITNESSFoam Squat Wedges (8.5 degree and 17 degree) (660 lbs / 300 kg rating)

I use these mainly for stretching rather than strength training, although these will certainly hold up if you decide to use them for those purposes.There are a total of 3 pieces that can be combined to make one giant wedge for stretching, or you can combine two of them to match the size of the 3rd piece (if that makes sense). This is pretty standard for any wedge that you will find out there.They're pretty durable, have a surprising amount of grip-strength with no slippage from my experience (when wearing shoes), and can support a lot of weight when squatting or deadlifting. They're also perfect for stretching out your calves, or practicing your deep squat for added mobility.There are a ton of wedges out there, but these are just as good as any other that I have tried in the past.Highly recommend!