Nylon coated hardened steel blade resists abrasion and wear for long life. Built in shock absorber to protect blade tip. True zero feature for accurate inside and outside measuring. Durable steel belt clip for convenience. Multi-riveted dual-end hook with bottom blade protector reinforces the blade tip and provides maximum pull out strength. Horizontal and vertical standout for easy one person measurements. Shock and impact resistant case. Steel belt clip for convenience. Rare earth magnetic end hooks. First 11″ has oversized bold numbers. Easy read fractional scale. Double sided rule for measurement while using against wall, ceiling, or conduit.