Even though it the combination wrench is a pretty simple tool, using it the right way can make a big difference in how easily a job goes and how well the fastener holds up. These quick tips cover a few basic practices that can help improve control, reduce slipping, and prevent damage to both the tool and the fastener.
#1 Choose the Correct Wrench Size
A combination wrench that is even slightly too large can slip under load, which increases the chance of rounding off the flat sides of the fastener. A proper fit allows the force to be applied more evenly and gives better control during use. This is especially important when working with older fasteners, coated hardware, or anything that may already show wear.
#2 Use the Open End for Quick Turns
Because it slips on from the side, it can save time in spots where there is not enough room to rotate the tool very far. This makes it practical for the early part of a job, especially when the fastener is not overly tight and speed matters more than maximum contact. In confined spaces, that easier repositioning can make the work noticeably more manageable.
#3 Use the Box End for Better Grip
Because it surrounds the fastener head more fully, it spreads force across more contact points and reduces the chance of the wrench slipping off under pressure. This can be especially helpful when loosening hardware that has been in place for a long time or when making the final turns on a fastener that needs to be firmly seated.
#4 Pull Instead of Push When Possible
Pulling often gives better balance and makes it easier to control the tool if the fastener suddenly breaks loose. Pushing can work in some positions, but it can also increase the chance of your hand slipping forward into nearby surfaces or components.
#5 Keep the Wrench Properly Aligned
Before applying force, make sure the wrench is sitting all the way onto the fastener and not just catching the outer edges. Partial contact puts more stress on a smaller area, which can damage the corners of the fastener and make it harder to remove later. It also makes the wrench less stable during the turn.
#6 Do Not Use Extra Leverage Improperly
It may be tempting to slide a pipe or another tool over the wrench handle to gain more leverage, but doing so can overload both the wrench and the fastener. Combination wrenches are designed to handle force within a certain range, and adding more length to the handle changes that force significantly. This can bend the tool, damage the fastener, or cause the wrench to slip unexpectedly.
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MISUMI USA carries a wide range of Box End Wrenches & Ratchets, including – combination, double ended box, spanner, and more. If you have any questions about fastening concerns for your next project or fix, please feel free to contact our product experts, and engineers. For more insights about combination wrenches, and other manufacturing related articles be sure to check out our blog, and articles like – What is a Combination Wrench, 7 Quick Facts About Combination Wrenches, Wrench Conversion Chart, and more.
Author: Scott Bredemann | Updated: 4/11/2026
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The content on this webpage is for informational purposes only. MISUMI makes no guarantees, expressed or implied, regarding the accuracy, completeness, or validity of the information. Performance parameters, tolerances, designs, materials, or processes should not be assumed to reflect third-party suppliers’ or manufacturers’ deliverables within MISUMI’s network. Buyers are responsible for specifying their part requirements.