Bonzer Black Bench Can opener EZ 40 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. Kitchens opening a greater number of cans a day will benefit from a more robust model. The EZ-40 is ideal for most hotels, cafes, restaurants, pubs and takeaways.