Shims are manufactured in numerous styles tailored to specific industries. Common types include solid flat shims (precision-cut metal plates of fixed thickness), laminated shims (constructed of layers that can be peeled away individually to customize thickness on site), slot or U-shaped shims (designed to slip easily around pre-installed anchor bolts), tapered construction shims (wedge-shaped wood or plastic pieces for leveling doors and windows), and coil shims supplied in continuous rolls for high-volume manufacturing lines.