Bonzer Black Bench Can opener EZ 20 Model: Bonzer 'bench type' black can openers - If you open a few regular sized cans a day then the EZ-20 will suit your needs. Ideal for guest houses, small or boutique restaurants, pubs and tea rooms. If you open a few regular sized cans a day then the EZ-20 will suit your needs. Ideal for guest houses, small or boutique restaurants, pubs and tea rooms.