HIGHROCK Black Skateboards T-TOOL ALL-IN-ONE TOOL Skateboards Hard plastic handleMetal parts are heat treatedSuper durableEasy to carry The main tool has 3 sizes of nut drivers to fit standard trucks and mounting haedware including wheel nuts(3/8 in socket,1/2 in socket,9/16 in socket). T-Handle Tool - The best tool for Works for all standard boards and mounting hardware including Allen head mounting bolts. This is a multifunction hard plastic handle metal parts are heat treated super durable easy to carry( It has a philips and allen keyon the removable bit). The T-tool is a small enough to fit inside pocket, it can help you do some repaies /changing out hardware.