Stainless Steel Dissection Pins – Value Pack.These stainless steel dissection pins are well-suited for a variety of applications:Qty 100: 0.1 mm diameter headless pins are very thin and light, best for holding delicate tissues lightly in place.Qty 100: 0.2 mm diameter headless pins are slightly thicker, and work very well for holding tissues and other specimens firmly in place.Qty 10: #3 pins have a small head and are very useful for pinning large, thick specimens.