Master Lock 510D Adjustable Shackle Key Padlock 1-3/4'' W, 9/32'' D, Steel 2-PK Secure your belongings with the Master Lock 510D laminated steel padlock, a rugged and versatile locking solution designed for reliable performance in demanding environments. Featuring a 1-3/4 inch wide (44 mm) laminated steel body, this padlock delivers superior strength and resistance to impact, prying, and tampering. The layered steel construction enhances durability while maintaining a lightweight profile, making it ideal for use on cabinets, bags, backpacks, marine equipment, and outdoor storage. The 9/32 inch (7 mm) diameter hardened steel shackle provides excellent cut resistance, deterring bolt cutters and other common attack tools. What sets this padlock apart is its removable adjustable shackle, which can be set to lengths between 5/8 inch and 2 inches (16 mm to 51 mm), offering unmatched flexibility for securing items of varying thicknesses. The shackle offers 13/16 inch of horizontal clearance and adjustable vertical clearance from 5/8 inch to 2 inches, allowing it to fit over larger hasps or uneven mounting points. Equipped with a warded locking mechanism, the 510D minimizes jamming caused by dirt, dust, and grime?making it well-suited for outdoor and industrial use. The single locking lever ensures smooth operation, while the special cylinder design enhances security. This padlock is keyed different, meaning each unit comes with a unique key code and no duplicates are available. It is not rekeyable or resettable, ensuring consistent security out of the box. With a compact rectangular design measuring 3.35 inches in height, 3.49 inches in width, and 7.37 inches in length, the lock fits neatly in tight spaces. Weighing just 0.520 pounds, it is lightweight yet robust. Packaged in a clamshell for retail protection, it includes one padlock and is ready for immediate use. Features - 1-3/4 inch wide laminated steel body for enhanced strength and tamper resistance - Hardened steel shackle with 9/32 inch diameter for superior cut resistance - Removable adjustable shackle fits openings from 5/8 inch to 2 inches - Warded locking mechanism resists jamming from dirt, dust, and debris - Single locking lever for smooth, reliable operation - Keyed different?each lock has a unique key, no duplicates available - Not rekeyable or resettable for consistent security - Ideal for backpacks, briefcases, computer bags, cabinets, and marine applications - Suitable for both indoor and outdoor use - Corrosion-resistant silver finish for long-term durability - Lightweight at 0.520 lb for easy portability - Clamshell packaging for protection and display Specifications - Brand Name: Master Lock - Model Name: Master Lock 510D - Part Number: 510D - Alternate Part Number: 114207 - UPC: 071649387203 - Product Type: Auxiliary Lock - Padlock Type: Laminated - Lock Style: Rectangular Lock - Body Material: Steel - Body Width: 1-3/4 in - Body Thickness: 3/4 in - Lock Material: Laminated Steel - Shackle Diameter: 9/32 in - Shackle Width: 3/16 in - Shackle Inner Width [Nom]: 13/16 in - Shackle Vertical Clearance: 5/8 in to 2 in - Shackle Horizontal Clearance: 13/16 in - Shackle Type: Adjustable - Shackle Length [Max]: 5/8 in (adjustable up to 2 in) - Locking Mechanism: Warded Locking - Cylinder Type: Special Cylinder - Keying: Keyed Different - Keying Type: Keyed Different - Key Type: Keyed different - Function: Padlock-Keyed Different - Combination/Keying: Keyed Different - Code Format: Warded Locking Mechanism - Number in Package: 1 - Package Qty: 1 - Packaging Type: Clamshell - Color: Silver - Height: 3.35 in - Length: 7.37 in - Width: 3.49 in - Item Weight: 0.520 lb - Manufacturer: Master Lock Company LLC - Country of Origin: China - ECCN: EAR99 - UNSPSC: 46171500 - Series: 510 Series - Sub-Series: 510-D - Nomenclature: 510D SLFLOCK STL PADLOCK1-3/16 - Resistance Properties: Cut Resistant - Indoor or Outdoor Use: Outdoor Product Application The Master Lock 510D adjustable shackle padlock is engineered for use in a wide range of personal, commercial, and marine environments where flexibility and durability are essential. Commonly used on backpacks, luggage, tool bags, file cabinets, utility boxes, and boat hatches, it provides reliable security in both temporary and permanent installations. The adjustable shackle accommodates irregular or thick mounting points, while the warded mechanism ensures dependable operation even in dirty or exposed conditions. With its rugged laminated steel body and cut-resistant shackle, this padlock delivers trusted protection for everyday security needs in homes, workplaces, and outdoor settings.