The perfect tool to add to your sewing tool kit. It's a tiny but mighty multi tool that can assist you with marking, sewing, poking, adjusting, guiding and more! 
Check out what this tool can do:
Imperial and Metic Ruler
1" wide with 1/2" marking for quick marking guide.
Pointed edge for poking our corners.
Angle for marking mitred corners.
Seam Jumper
Seam Allowance Guide
Needle Insertion Guide
And even has a convenient hanging hole.