I dropped and broke the original top (see picture) so I designed and built this replacement. If your caddy is different then the included openscad file might save you some time. In version 2 I made the clip stronger. It's a lot harder to put on but once there ... Also made the walls a bit thinner so when build in transparent it is easier to see the drill bits.The top is 66mm inside diameter and 43mm high. My caddy holds metric drills.