Mason bees do no produce honey or beeswax, but they are one type of bee that make great pollinators. They are peaceful insects and won’t sting or bother you (unless it’s being provoked).
To encourage Mason bees to pollinate your garden, why not build them a little house?

Here is a good example of a handmade Mason bee house. Looks like a birdhouse filled with bamboo reeds. Photo from Help Save Bees from UK.
If you have a block of wood and some drill bits, you can also make a Mason Bee house. Just drilled short holes in the block and hang them in a sheltered location. For more info and neat instructions on this method of bee house, check out Gardens for Wildlife.
And if you have access to lots of bamboo reeds, you are in luck. Just take those and cut them about 5-6 inches. There is no need to put them in a house (like in the photo above). Just gather the cut bamboo reed together, tie them with a string and place them between tree branches. Especially in fruit trees, soon enough you’ll be rewarded with more fruits!
From a distance, the Mason bees look black, but is actually dark metallic greenish blue in color.

Photo from British Columbia (Canada) Ministry of Agriculture and Land.
Unlike Honey bees, Mason bees are solitary bees. Every female Mason bee is fertile and makes her own nest. They also have modified hind legs called corbicula to store and carry pollen. The pollen is packed underneath rows of stiff hair under the stomach area.
Also from British Columbia is the following info on Mason bees:
“Orchard Mason Bees are shy and fly away when disturbed. Even at their nests, female bees will not display defensive behavior even though, they are capable of stinging. Similarly to honeybees, Orchard Mason Bees gather nectar in their ‘honey sac’ while foraging. The nectar is used as energy source and to provision the tubular nest.”

Mason bees are becoming a popular way to improve pollination for orchard and small gardens. If making your own Mason bee house is too much, there are a few you can purchase.
The one pictured above is available at Gardener’s Supply Company, for $14.95. The outside is made with strips of bamboo weaved together. And the inside is filled with bamboo tubes. Perfect for the female bees to lay their eggs. I like the tear drop shape of it too.
Or you can still make your own, using a kit found at Kinsman Orchard Bee. Prices run between $14.95 to $25.