Complete set of 9 tools: each is double ended for a total of 18 sizes: 8mm (fits 9mm / 10mm) / 15mm (fits 17mm). 25mm (fits 27mm) / 28mm (fits 30mm). 22mm (fits 24mm / 25mm) / 31mm (fits 33mm). 25mm (fits 27mm) / 35mm (fits 37mm) 41mm (fits 43mm) / 47mm (fits 49mm). 50mm (fits 52mm) / 53mm (fits 55mm) 56mm (fits 58mm) / 65mm (fits 67mm). 60mm (fits 62mm) / 69mm (fits 72mm). 75mm (fits 77mm / 82mm) / 83mm (fits 86mm). Silicone rubber. Use it to safely remove the Lens's front retaining ring. No more scratches from spanner wrenches. Very efficient minimal force is used with no risk to the glass. Far superior to plastic filter wrenches.