The MTC Bio M5421 L-Shape Spreader, 38 x 156mm, is supplied in sterile packaging, but is also autoclavable and has smooth, rounded edges to prevent unwanted cutting, scraping or gouging of agar during inoculation. The L-shape spreaders are ideal for spreading bacteriological cultures evenly. The shape allows the user to rotate and apply easily throughout an entire round plate or dish. They are made of ABS and have a slight upward curve at the edge to prevent dragging or scraping.