MSS-12 Safety System Package by Nature House World's most popular martin house, and the safest system on the market. Nature House has made hosting purple martins easy and safe for people of all ages. Older people get such joy from hosting purple martins "Grandma" and "Grandpa" are anxious to share this pleasure with grandchildren. The Nature House rope operated system makes it easy for old and young alike to raise and lower the aluminum house - and the lanyard insures their safety while doing so. There isn't another system on the market today that that offers the unique Lanyard Lock safety feature found on Nature House Martin Safety Systems. MSS-12 Martin Safety System comes with everything but the birds! Complete martin house system Type: Feeders Bird Species: Bird Location: Outdoor