Our BOLT™ Marker Clip is designed to securely hold markers and pencils. The clip is compatible with all Milwaukee® head protection including helmets and hard hats. It easily clicks into the head protection's BOLT™ Accessory slots letting you use the universal accessory slots to clip in additional head protection accessories like ear muffs. The marker clip is part of Milwaukee® BOLT™ System that lets you adapt to your jobsite by adding BOLT™ accessories to your Milwaukee® head protection. All Milwaukee® hard hats and helmets are BOLT™ compatible.