Leatherman 831852 Thruster Stainless Steel Surf Pocket Multi-Tool Rubber Bit Holder: A secure rubber piece found on Leatherman PocketTools that holds tool bits in place when not in use. Travel Friendly: This product is compliant with current TSA (Transportation Security Alliance) regulations for allowable carry-on items Lanyard Hole: A hole designed in the body of the tool meant for attaching it safely and securely to a lanyard. Often people who work near water or on scaffolding attach their tool to a lanyard on their person to avoid losing the tool if it's dropped.