This is a C S Osborne & Co awl handle with pre fitted No43 diamond shaped sewing awl blade.
Ideal for hand stitching, this quality tool has a smooth beechwood handle which fits comfortably in your hand, giving you all the control you need to make your holes safely and easily. Saddlers often use the handle of their stitching awl to help push the needle through, when sewing thicker leathers.
Before buying an awl: Stitching awls are perfect if you want to stitch using the traditional saddlers double hand method, but there are other ways to make stitch holes in your leather as well.
You may also like to consider a stitch punch, especially if you are just starting out in leather craft.