Spanner and Wrench Guide: The Right Tool for Every Fastener

Spanners and wrenches are essential for any fastener work. Using the right type prevents damage and makes work easier.

Combination Spanners

The most versatile option:

• Open end one side, ring end the other
• Same size both ends
• Open end for quick fitting
• Ring end for final tightening

Ring Spanners

Enclosed ends for maximum grip:

• Fully engage the fastener
• Less likely to slip or round
• 6-point or 12-point options
• Often offset for clearance

Open-Ended Spanners

Quick access where rings won't fit:

• Side access to fasteners
• Quick repositioning
• Higher slip risk
• Often double-ended with adjacent sizes

Ratcheting Spanners

Speed and convenience combined:

• No need to remove and reposition
• Fast operation in tight spaces
• More complex mechanism
• Slightly bulkier heads

Adjustable Spanners

Variable size for flexibility:

• One tool covers range of sizes
• Useful backup when correct size unavailable
• Less secure grip than fixed spanners
• Can damage fasteners if not fitted properly

Sizes and Standards

Common systems:

• Metric: 8mm to 32mm typical range
• AF (Imperial): Used on older equipment
• Whitworth: Historic British standard

Quality Indicators

Good spanners feature:

• Chrome vanadium steel construction
• Precise machining for good fit
• Clear size markings
• Comfortable grip

Building a Set

Essential sizes for general work:

• Metric: 8, 10, 11, 12, 13, 14, 17, 19, 22mm
• Plus adjustable wrench for odd sizes

Using Spanners Correctly

• Always pull, never push (avoid injury if it slips)
• Position for maximum engagement
• Keep the spanner perpendicular to the fastener
• Don't use extensions for more leverage

Quality spanners from our hand tools range make fastener work faster and safer.