Roller Bolts 0 Reviews Roller bolts can be used for lifting and lowering of tunnel segments in to place. More specifically designed for SGI segments, the roller bolt can be bolted into pre-existing fitted segments, and by using winches and winch ropes looped through the roller bolt, you can safely locate. SUBMIT ENQUIRY Submit SEE MORE Miscellaneous Features Sizes Reviews (0) Simple Design Safer means to remove SGI segments Easy to use Various, and can be designed to suit your application Comments are closed.