Narva Black Led Deck Lamp Red White Light Output 82913 Instantly seals most punctures to FIR861 Instantly seals most punctures to the tread area SSA4 Toledo Engineers Square 100mm Used for producing right angles in carpentry and engineering applications Internal & External Squareness as per BS 939 Grade B An excellent range of precision steel squares that are second to none Hardened spring steel blades are permanently fixed to the stock by means of tapered self locking rivets which ensure complete rigidity Both the blade and stock are precisely ground to ensure straightness and parallelism Working edges of the blades are lapped which further enhances accuracy A groove on the inner corner of the stock aids in the clearance of burr or dirt Type: Non graduated Blade length: 100mm 72443 BLACK LED DECK LAMP RED WHITE LIGHT OUTPUT Corrosion and galvanic corrosion on aluminium boats needs to be a managed the red light provides plenty of light to operate without losing the precious night vision