I didn't buy this from Revain. However, my review refers to the same product. The screws are ok and match the SBC 350. DO NOT RELY on the socket included in the kit. It's a nice idea to have one in the kit, but it's useless, and when you tighten the bolts (6-7 ft-lbs for the small four and 9-10 ft-lbs for the big four), you'll find that it is turned off. If using this kit, buy a 1/4" 12-point working head (any drive will do. I used a 3/8"). You save time and nerves.