This spool is designed to work with 1" wide webbing. It has a hole for a 1/2" hex shaft used to turn the spool, and two 1/4" holes for bolts to hold everything together. Those holes are recessed, so they don't interfere with the webbing. One of the 1/4" holes has some extra clearance around the middle to allow the webbing to be looped around it and secured. It also comes with a guide. The guide is designed to place the webbing on the spool, such that it doesn't come off and get tangled. It has clearance holes for a 1/2" hex shaft, so it should be mounted right around the spool!Print the spool twice. We recommend printing with 100% infill, as it will be placed under a large compression force when used. Assemble it using 2 1/4-20 bolts/rods and 1" webbing on a hex shaft. Print the guide in a different color from the spool for some extra pop!