Each wrench end has a different size opening with a 15° angle that provides clearance over obstructions.
22-18370 - Seven Piece SAE Combination Wrench Set
15° angle at both the open and box ends allow for work in confined spaces and provides clearance over obstructions.
22-18375 - Seven Piece Metric Combination Wrench Set
22-18385 - Three Piece Fully Reversible Ratcheting Offset Box Wrench Set
Set of three offset and fully reversible ratcheting box wrenches with different size single-hex openings on each end. Offset 25° for use in confined spaces and on long studs.
22-18390 - Grip-It® Hex Key Set - Six SAE and Six Metric Sizes
Handy hex key set fits in your pocket or tool box for quick access and helps eliminate the lost-key problem. Ends are square-cut for a secure full-depth fit and maximum contact with the hex socket to prevent slippage and stripping of the socket.
I have dealt with MCM Electronics a number of times and have been more than satisfied.