Fibre-Metal Hard Hat B3702 Clip-On Adapter for Non-Slotted Hard Hats (One Pair) Go to amazon.com Related posts Top recommendation for fibermetal hardhats FeatureEasy to mount onto hard hatsDurable plastic and metal styles to withstand the most demanding conditionsClip-on DescriptionFiber-Metal B3702 Howard Light Clip-On Adapter is intended for use with non-slotted hard hats and helmets.