This drive bay mounting bracket kit let your 3.5" drive completely fitted into a 5.25" drive bay. Maxmize the interanal spece of your computer case for efficient usage. Supports any computer case with an available 5.25" drive bayShock absorption design, protecting and prolonging life of hard driveReduce mechanical noise and working temperaturesupports a 80mm fan installation ( fan does not include), optimum heat radiation effect for HDDClassic black color, easy match with any computer caseEasy installation