BHL-2501S features 250 kilograms holding force with door signal. It offers a series of ??ions  with or without signaling, water-proof or embedded mounting and holding force from 40 kilograms up to 500 kilograms for customers'' needs. BHL-2501S is compatible with any access control system on any door. It is durable and user-friendly. You can find an animated installing presentation on Behost '' s web site.