Never need to guess again, We at PCTCG have taken the guessing out of centring. 

We know whether its for the binder or for grading centring is EVERYTHING - that's why we came up with this hand little tool to help you find the best of the best. 

PSA Becket & ACE along with many other grading companies allow for a 45/55 boarder percentage, with this tool not only will you be able to find those EXACT 45/55 boarder but you'll be able to find the PRESTINE 50/50 boarder.