This seemingly simple model is one part and does not require supports. i prefer to pring them in petg for the added strength and durability, however have had great success with other filaments as well. this line block is disigned for masonry use using a 1 ½ inch speed pole but is very usful in all sorts of sutuations and on many differant materials, it holds very well and tight and much stronger and longer lasting than wooden line blocks. :)