Guuun CZ Grips Screws, 4 O Rings, T10 Torx Key, 4 Stainless Steel Screws Fancy CZ Screws CZ-Screw-GK(1) These CZ Screws for all full size grips and slim grips not less than 0. 188" (3 16") thick (2)416 Stainless steel with hardened to 39 rockwell hardness. (3)4 screws, 4 o rings, T10 Torx keys included. (4) 4 compression O rings, the O ring washers give the grips a secure feel when tightened down. (5)Risk Free Policy 60 Day Refund Guarantee and Lifetime Warranty Policy make your purchase risk free. This CZ Grip Screws Form and function come together