Why has no one done this before? Our handy block is a 4-1/2" x 6", 1 pound block of cured hardwood with 88 holes for organizing burs, needle files, beaders, mini brushes, etc. Each hole is 3/8" in diameter to accommodate either 3/8" or 3/32" shanks. This block is slanted so the user can see all instruments at a glance. The handy block also features say put rubber pads on the bottom to keep it from sliding. Not appropriate for dental burs.