Customizable knurled razor handle. Most of the dimensions and some of the knurling parameters can be customized. As is, comes 85mm long and 15mm in diameter with a hole for an M5 thread nut. American razors might use different threads.
Glue in an M5-0.80 nut into the tip, taking care not to block the screw hole beneath the nut. I used two part epoxy carefully applied around the edge of the nut before inserting it.