I bought this because of a standing injury. I have considered Slider from various Manufacturers. I bought Striker's Engine slider because it has three slits and the word Striker on it is Parenthesis good. I was troubled with Black Spec. but because my engine is Silver, I bought Standard Type which has Silver base. The installation is still in progress, so I can't get a feel for it yet, but it's a manufacturer I trust, so I'm sure it'll be fine!