the handle, the blade, the pivot or axle, the metal collar and the locking ring or "Virobloc". The blade is quite thin, only 1.68mm (.066 inches), which helps keep its weight to only 45g (1.6 ounces). Original Opinels and the smallest sizes today are still made of only 4 parts, lacking the simple Virobloc locking mechanism. The locking ring can easily be removed with simple tools for use in countries where locking knives are prohibited; some sources claim that opening the blade with the ring in the locked position causes the ring to pop off; it can be replaced easily later if desired. The No. 8 Couteau du Jardin or Garden Knife uses a folding drop-point blade with a slim, tapered wood handle, while the Opinel No. 8 and No. 10 Pruning Knives, designed for pruning shrubs and vines, feature a large folding hawkbill blade fitted to an elegantly curved wooden handle. The Opinel Slim Effile series use a thinner-profile stainless steel blade fitted to a tapered wood handle. Available in several sizes and handle materials, the Slim Effile knives are intended for tasks such as cleaning and fileting fish and thinly slicing meats and cheeses. The traditional Opinel is designed to be opened with two hands, and a nail nick is provided on the blade. It is possible to adjust the fitting of the safety locking collar if it is too tight or too loose. Those practiced in the art of coup du savoyard grip the metal collar between index finger and thumb and tap the heel of the handle firmly on a hard surface, as if using it as a drumstick; the blade should open slightly from the handle, allowing it to be rotated into position with the thumb. Logo The main couronnée ("crowned hand") device was already present on the blade of very early models. Later the words OPINEL and FRANCE were added, as well as INOX ("stainless", from "INOXidable", meaning "non-oxidizable) in the case of stainless steel blades. The image of the hand comes from the arms of Saint-Jean-de-Maurienne, and represents the relics of John the Baptist, three of whose finger-bones were supposedly brought back from Alexandria by Saint Tecla in the 5th century. The crown comes from the arms of Savoy, the larger region containing Savoie. Sizes and variations Opinel knives are currently offered in eleven numbered sizes: 2, 3, 4, 5, 6, 7, 8,