This is the Wizardhat hardware only set, it does not come with the 15mm wrench. This hardware set will work with any base plate or 4-bolt tracked board on the market. This included M8 or M6 base plates and tracks. There is no more need for T-nuts or different sized bolts the Wizardhat will work on any. Also, the way the bolt sticks up through the track on top makes it easy to line up with the base plate. The Wizardhat hardware only set comes with 4 qty Wizardhat hardware (includes cone nut, t-bolt, and t-slider with a decal. Be careful not to over-tightening with the wrench as you will have a lot more leverage than the screwdrivers you have been using.