These grips were designed as custom fit to EVERY one's hand due to the unique chisel cut into shape of fingers holding your gun. Material used was G10, a modern composite material which is total impervious to water, oil, solvent and most common chemicals. A hand finish to break all the sharp points which bite in hands too much when holding to make sure all these grips fit in hands. This is a standard cut on compact, we do carry magwell cut on full size and compact, check them out in our store. Measurement between two center holes are 2 11/16", thickness is 1/4". 60 days return policy make your purchase risk free. No questions, no condition, just let us know reason for return to help us improve our service to customers.