Review on Spinning Base 125Mm Surface Thick by Josh Chenier

I use this reversible concave lens for gyros. The large diameter (12.5 cm) makes spinning easier. The lens is of good thickness and weight, making it stable on the table and not swinging when the lid is rotated. The only drawback is that both sides have the same curvature (the exact value is not given in the description) and are slightly curved in the case of large slabs or slabs with a small gap. Good value for money worldwide.