Grademaster Card Grading/Centering Tool

This tool can be used with the proprietary centering calculator sheet to decide whether you should send your trading/sports/role playing cards

I'm a noob to the hobby and card grading. Using Dead Center App to try and get an idea of the centering on these. Does anyone know how to read it? Thanks!

Passive Paradise Card Grading Centering Tool Set

J-E-T-S! JETS! JETS! JETS!

2015 in Stamps

PSA submission - using the GradeMaster card centering tool - sample 02

4 PCS CARD Grading Centering Tool Set with 30X Magnifying Tool Card Centering $43.30 - PicClick AU

Card Centering Tool for Grading - Grade Centering Tool

EZ Grade - Mobile Sports Card Grading App

Passive Paradise Card Grading Centering Tool Set

GEM MINT Card Grading Centering Card Tool Kit for PSA BGS SGC🔥 works Pokémon

Original Grademaster Card Centering Tool

Αύριο (6/7) το κρίσιμο ραντεβού Σλούκα-Μπαρτζώκα