I am very impressed with these tool holders. An amazing balance between quality, standard tool kit and price. The finishes are amazing and they all go together really well. Unfortunately I have to send them back. The CAT40 was an optional upgrade for my machine and the seller I bought it from was misinformed about the size. It's a pity that there was no similar package for BT40 - this seller would have my money immediately. Unfortunately, choosing BT40 tool holders is difficult at best. I wholeheartedly recommend them to anyone with a CAT40 machine with no regrets.