Wrench Set Isma 12-piece open-ring wrenches 6–22 mm (6,7,8,9,10,11,12,13,14,17,19,22mm)

The Isma 12-piece open-ring wrench set contains twelve metric sizes ranging from 6 mm to 22 mm (6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 19, 22 mm). Each wrench combines an open end for quick placement with a ring end that provides improved grip and torque on hex fasteners. Designed for general-purpose use, the set covers the most common metric dimensions required for assembly, tightening and maintenance in automotive, household and workshop applications.

Advantages

The combination of open and ring ends on each wrench allows both rapid engagement and secure turning of nuts and bolts. The range of metric sizes in one compact set reduces the need to switch tools and ensures compatibility with most standard fasteners. Isma wrenches are manufactured to provide consistent fit and reliable contact with hex heads, helping to minimize rounding and slippage during use.

Suitable for

• Automotive repair and maintenance tasks
• Household DIY and furniture assembly
• Workshop maintenance and machinery adjustments
• Bicycle and light equipment servicing

Key specifications

• Set composition: 12 open-ring wrenches in metric sizes
• Included sizes: 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 19, 22 mm
• Ends: one open end and one ring end per wrench
• Material and finish: durable metal construction with corrosion-resistant surface treatment
• Use case: manual hand tool for hexagonal fasteners
• Packaging: compact set suitable for storage in a toolbox or drawer

How to use

Select the wrench size that matches the fastener and place the open or ring end over the nut or bolt head. Use the open end for quick placement and the ring end when greater grip and torque are required. Apply steady, controlled force and avoid sudden jerks to reduce the risk of rounding the fastener. When loosening stuck fasteners, position the wrench to maximize contact and leverage, and consider using penetrating oil if necessary.

Usage recommendations

Store the wrenches in a dry place to prevent corrosion and maintain fit accuracy. For best results, use the ring end for final tightening to ensure secure engagement and reduce wear on fastener corners. Avoid using the wrenches with hammer strikes or as prying bars; use tools rated for impact or leverage when required.