Easy to use: just pull the base outward to remove or insert the retaining pin. (Do not take out the fixed pin by force, it will cause the solder joint between the ring and the pin to fall off) The leather sewing dowels are made of high-quality durable metal, which is anti-corrosion, rust-proof and durable. Each leather stitching pin is . Its base is knurled and non-. Needles and rings are stainless steel and made of bar stock with a smooth exterior for easy removal Uses: Leather suture positioning pins are used to fix sutures when making leather products by hand. With positioning function, each leather splicing positioning pin is . There's a brass protective tube with a pull-out end cap to keep safe and hold everything in place.