This is a stepless drill bit case, with holes that are 20x80x22 to fit varies sizes of stepless bits. This was designed to fit the 3 pack with sizes: 3/16 to 1/2 in.; 1/4 in. to 3/4 in.; 1/8 in. to 1/2 in. but can fit any item or bit that fits with the dimensions listed.

Update 1/3: Added +.05 clearance case