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The GROBET 31.555 is a Swiss-pattern knife needle file designed for precision material removal in tight or angled workspaces. It features a knife profile with a Cut 2 tooth grade, making it suitable for medium-fine finishing work on metal, plastic, and similar materials. The overall length is 5.5 inches with a 2.5-inch length of cut. The file is 0.22 inches wide and 0.06 inches thick, giving it a slim cross-section that reaches narrow slots, keyways, and angled surfaces. It includes a tang end for use with a separate handle and has no pre-attached handle.
Swiss-pattern needle files are standard tools in precision trades including tool and die work, instrument repair, metal fabrication, and detailed finishing operations. The knife profile is particularly useful for filing in corners, notches, and V-shaped grooves where a flat or round file cannot seat properly. This file suits bench work in machine shops, HVAC component fitting, electrical panel work, and any application requiring controlled stock removal on hard or soft metals.
Designed as an OEM-style Swiss-pattern needle file compatible with standard tang-style file handles sold separately; suitable for use across metalworking, fabrication, and precision finishing applications.
A licensed or experienced tradesperson should always attach a proper handle to the tang before use to prevent hand injury during filing. Secure the workpiece in a vise or fixture before applying file pressure. Apply filing strokes in one direction with consistent pressure to maintain cut efficiency and extend file life. Inspect the file for cracks or missing teeth before each use and replace if damaged.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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