IMPA: 610831

Open & Ratchet Type 12-Point Box Wrenches

The open & ratchet type 12-point box wrench is a versatile hand tool for marine maintenance and repair. Featuring a conventional open end on one side and a ratcheting 12-point box end on the other, this wrench delivers fast, repeatable fastener rotation without the need to lift and reposition the tool. Ideal for use in confined engine rooms, deck equipment, and piping systems, it is a dependable choice for ship chandler supply and vessel overhaul projects.

Manufactured from hardened chrome vanadium steel with an anti-corrosion finish, these wrenches withstand the humidity, saltwater spray, and heavy use found in marine environments. The 12-point box end grips the fastener securely with multiple contact points, reducing the risk of rounding bolt heads and ensuring reliable torque transfer. Metric sizes are clearly marked for quick identification, making these wrenches a practical addition to any onboard tool kit.

Available in a standard set of metric sizes, each wrench is engineered for durability and ease of use. The ratcheting box end is reversible for both tightening and loosening, and the open end offers a convenient alternative for turning fasteners at various angles. Whether you are working on ships, boats, or offshore installations, these wrenches provide the precision and strength needed for demanding tasks.

Key Features

Technical Specifications

SpecificationDetails
Wrench TypeOpen & Ratchet Type 12-Point Box Wrench
Product CodeIMPA 610831
Head ConfigurationOpen end and ratcheting 12-point box end
Ratcheting DirectionReversible (clockwise / counterclockwise)
Available Sizes8, 10, 12, 13, 14, 15, 17, 19, 21, 22, 24 mm
MaterialChrome vanadium steel
FinishAnti-corrosion coating (satin or chrome)
Open End Angle15° offset
Length Range150 mm – 340 mm depending on size
StandardsDIN 3113 / ISO 7738 (typical compliance)
ApplicationMarine engineering, ship maintenance, industrial maintenance

Frequently Asked Questions

Are these wrenches suitable for marine and offshore use?

Yes, these wrenches are made from chrome vanadium steel with a corrosion-resistant finish, making them well suited for saltwater environments, vessel engine rooms, and offshore maintenance work.

What size range is available for this wrench set?

The open and ratchet type 12-point box wrenches are available in metric sizes from 8 mm to 24 mm, including 8, 10, 12, 13, 14, 15, 17, 19, 21, 22, and 24 mm.

How does a 12-point ratchet box end improve fastener handling?

The 12-point design provides multiple contact surfaces against the fastener, which helps grip the bolt or nut more securely and reduces the chance of slipping or rounding off corners. It also allows for smaller ratcheting arcs, making it easier to work in confined spaces.

Is the ratcheting action reversible for both tightening and loosening?

Yes, the ratchet mechanism has a reversing lever that lets you switch direction, allowing you to tighten or loosen fasteners without removing the wrench.

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