Wisine Fasteners & Metal has the capability to manufacture bolts & Nuts,special screws and special profile customized for your company. Special tooling can be created to produce nonstandard dimensions or with your company’s name and/or logo. Allen Key Bolt Use these bolts for bicycle & motorized bicycle projects like rebuilds & adding accessories. Allen Key Bolt Socket caps have a small cylindrical head with tall vertical sides. Allen (hex socket) drive is a six-sided recess for use with an allen wrench (hex key).