Chosen Solution
On the page for replacing the battery in my mid-2012 13” macbook pro, MacBook Pro 13" Unibody Mid 2012 Battery Replacement it tells me I need a Y0 tri-point screwdriver. In Step 5 it states: One 5.6 mm Tri-point screwOne 13 mm Tri-point screw Are those measurements for the screw length or are Y0 tri-points available in assorted sizes OR are Y0, Y00, etc. each a fixed size designation? Researching it online is not definitive, and most I find are tri-wing vs tri-point. I did find your Mako Driver Kit - 64 Precision Bits listing Y000, Y00, Y0 and Y1.
The size is the length of the screw. You need a Tri-point Y0 Screwdriver screw driver or bit if you are using the driver kit.
