This is a simple tap and ream holder in a single gridfinity block. It holds the following:

• 2mm tap
• 3mm tap
• 4mm tap
• 5mm tap
• 6mm tap
• 6mm end-mill
• deburring tool
• tapered ream with t-handle

It features raised numbers for the taps and end-mill. No particular slicing settings are needed. The holes are .5mm oversized for a nice fit. I like the set the tapered ream with a few turns first time I seat it to make it nice and snug.