Grading Kit for sports cards and Trading Cards Tabbed Card Sleeves | Centering Tool | Thickness Gauge Tool Guide 3pc kit for grading and card submissions to PSA, BGS or SGC -Card Centering Tool- Our grading tool is perfect for determining your cards centering. Before sending cards to grading companies like PSA - BGS & SGC, determine your cards centering grade first. Durable high quality transparent acrylic. Crystal clear material that has the most accurate measurements for standard cards measuring 3.5 x 2.5inches in size. Our grid makes it easy to align your card to match the outer edge. Identify the line you wish to center, note the numbers Top to Bottom & Left to Right. Then refer to the percentage guide for centering percentage. You will receive: 1pc Centering Tool, 1pc (FRONT) How to Use Card Centering Tool (BACK) Centering Percentages, 1pc micro fiber cloth. All enclosed in a sealed package. - Tabbed Card Sleeves - Soft tabbed card sleeves with easy pull tab. Comes with 1pk of 100 individual card sleeves. - Gauge Tool - ProGuard Cards Trading & Sports Card Thickness Guage Tool Guide. Leave the guessing out of it. Clear material for easy use. Durable plastic that lasts. Fits in standard penny sleeves for storing and protecting.