These Prym Bodkins, made of hardened steel and refined brass, are ideal for inserting elastic tapes and cords through a waistband, hood tunnelling, etc.
The brass version is a needle that is divided at the shank and opens towards the eye. This gives the tip of the needle a spherical shape. If a tape is threaded through this eye and then inserted down the needle shaft halves, it gets caught and can be pulled through the tunnel while it is securely anchored.
The other bodkin, made of stainless steel, also features a blunt tip. However, it has a wide, flattened, and thus, thinner needle shaft with a long and round eye. The long eye is caters for tapes and thick yarns, the round one is suitable for finer yarns and o-rings.
The bodkins burr-free, rounded tips are designed to ensure no pirecing of the material and ensure the bodkin and tape can slide easily through any fabric loop or tube.