Really isnt a lanyard for a wrist per say more for the locking feature..
i just did mine since i dont have picks of my bro's. Drilled the handle used about 30" of 550 cord and tied a diamond knot to fit. Trick is to get that knot tight so its pretty hard to slip over the buckle.. the knot will tighten and produce slack over time. I also left the working ends to tug on for ease of looping and unlooping. 10 minutes while learning the knot on youtube. ?