Center Scriber Line Tool - One-Handed (R&L) - for GraphGear 1000

thingiverse

This is a centerline marking scribe, similar in general function to many other centerline scribes. However, it is custom designed to fit the Pentel GraphGear 1000 (PG1019) 9mm mechanical pencil (7mm & 5mm would probably fit as well; other brands of mech. pencils might also work if they have similar dimensions). It is also designed to make it easier to apply forward, downward and sideways force while simultaneously holding the pencil in place (in a traditional position that one would hold a pencil). The custom pencil shaft provides a nice, snug fit without damaging the pencil tip, but for best results, it is good to hold the pencil in place. There are contoured surfaces to allow one to use all 5 fingers to accomplish this while applying the necessary force to keep the tool aligned. There are channels cut into the studs to help reduce inaccuracies that can be caused by rough side corners and splinters. The studs are .4" long, to make it possible to scribe 1/2" tall material without the studs dragging on the support surface. There are three sizes with stud-to-stud clearances of 1.75", 2.75" & 3.75" (Sm., Med. & Lg.). Hanging holes are also provided for storing them on pegboard hooks, nails, etc.