The TDBL is a quick, efficient and secure way to fix supporting steel structures together subject to static loads.
The self-threading TDBL fastener is inserted into the punched hole and effortlessly driven in using a cordless impact driver.
Until the TDBL was developed, putting pre-drilled supports together was complicated and time consuming. It required the use of standard bolts, washers and nuts, with a connection accessible from both sides.
The fastening must always be made from the appropriate direction (from thin to thick). The diameter of the punched or drilled hole must match the fastener.
You will need the following installation tools: