POLYCAST 500 Fiberglass Grate Locking Device.
Each locking device includes:
Round Head Screw
Butterfly Clip
Lock Bar
Locking device for POLYCAST 500 series for fiberglass grates.
Each locking device includes:
Round Head Screw 6-32 x 1.50"
Butterfly Clip
Lock Bar 1" x 4.75" 
Grates need to be locked in place in situations where there's a possibility they will be driven over, preventing the grates from hopping. It also prevents debris from working in between the grates and channels which can ultimately damage the grates. This helps to provide system integrity when used appropriately.
