Features and Benefits Large magnetic dual-end hook allows for easier one-person measurements on ferrous metals Dual-end hook with double sided blade for easy measurements, markings and drawings Comfortable rubber grip built into case for positive gripping and impact resistance Positive blade lock holds blade securely in place Oversized easy to read blade numbersKlein's 25' Power-return Rule features nylon coated hardened steel blade that resists abrasion and wear for long life. With built-in shock absorber to protect blade tip and true zero feature for accurate inside and outside measuring. Durable steel belt clip for convenience. Multi-riveted end hook with bottom blade protector reinforces the blade tip and provides maximum pull-out strength.