
TM
4-1/2" VISE 57737
6" VISE 57738
Visit our website at: https://www.harborfreight.com
Email our technical support at: [email protected]
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference. 25a
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-800-444-3353 as soon as possible.
Copyright
©
2020 by Harbor Freight Tools
®
. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.

Page 2 For technical questions, please call 1-800-444-3353. Item 57737 57738
Specifications
Item 57737 57738
Base 360° Swivel Base
Jaw Opening 4.5" Maximum 6.5″ Maximum
Anvil Size 3.63" x 2.88" 4.5" x 3.63"
Base 6.2" x 6.2" 7.5" x 7.5"
IMPORTANT SAFETY INFORMATION
1. Mount before use according to these instructions.
Improper mounting can create hazards.
2. Wear ANSI-approved safety goggles and heavy-
duty work gloves during mounting and use.
3. Keep work area clean and well lit.
4. Keep bystanders out of the area during use.
5. Before drilling holes, check for hidden
utility lines in drilling path.
6. Do not use when tired or when under the
influence of alcohol, drugs or medication.
7. This product is not a toy. Do not allow
children to play with or near this item.
8. Use as intended only.
9. Inspect before every use; do not use
if parts are loose or damaged.
10. Do not exceed listed weight capacity.
Be aware of dynamic loading! Sudden
load movement may briefly create
excess load causing product failure.
11. Maintain product labels and nameplates.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
12. When working with the Anvil, do not strike with a
hardened tool.
It could chip the Anvil and/or the tool.
13. Damage could occur to your vise and/or
workpiece if you overtighten the Handle.
SAVE THESE INSTRUCTIONS.
TM

Page 3For technical questions, please call 1-800-444-3353.Item 57737 57738
Mounting Instructions
1. Use the mounting holes on the Base as a
template to mark drill points. Set the Vise
flat on the workbench so that the mounting
holes are positioned as desired. With a pencil,
mark the points at which to fasten the Vise
onto the workbench. Set the Vise aside.
2. Drill holes of the appropriate size
(where previously marked with a pencil)
through the top of the workbench.
WARNING! TO PREVENT SERIOUS
INJURY: Before drilling holes, check for hidden
electrical wires or cords in drilling path.
3. Carefully set the Base with the Mounting
Holes corresponding to the holes previously
drilled through the top of the workbench.
Note: Mounting bolt diameter should fit
mounting holes, 7/16". Mounting bolt length
is based on workbench thickness.
4. Insert hardened steel bolts (not provided), of the
appropriate diameter and length, downward through
the Base and the workbench. Secure the mounting
bolts with the appropriate washers and nuts.
Operation Instructions
1. Loosen the two Base Handles to allow the Base to
pivot. Tighten the Base Handles before working.
2. Turn the Handle counterclockwise
to open the Jaws of the Vise.
3. Place the workpiece inside the Jaws.
4. Tighten Jaws against the workpiece
by turning the Handle clockwise until it
is held securely inside the Jaws.
Maintenance
1. Keep the moving parts lubricated. Wipe off
any lubricant on the Handles and Jaws.
2. Keep the Jaws clean.
3. The jaws can be removed for cleaning and are
replaceable. Each is held on by two cap screws.
4. Check and tighten the mounting screws/bolts to be
sure the vise has not loosened from its mounting.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not available individually
as replacement parts. Parts may not be interchangeable. Specify item number when ordering.
Specify UPC 193175421739 when ordering parts for 4-1/2 Vise.
Specify UPC 193175421746 when ordering parts for 6″ Vise.

26677 Agoura Road • Calabasas, CA 91302 • 1-800-444-3353
LIMITED LIFETIME WARRANTY
This DOYLE product is warranted to the original purchaser to be free from defects in materials and workmanship
for the useful life of the product. To obtain warranty service, visit your local Harbor Freight retail store. Warranty
registration is not required. The product or part must be returned with proof of purchase (e.g., in-store receipt
or packing slip/invoice) and may require shipment by purchaser to a service center at purchaser’s expense.
If our inspection verifies a covered defect in materials or workmanship during the warranty period, we will,
at our option, repair or replace the defective product. We will return repaired products within a reasonable
time at our expense, but if we determine that there is no defect, or that the defect resulted from causes not
within the scope of our warranty, then we will return the product to you if you pay return shipping costs.
This warranty does not cover any failure or damage that we determine is due directly or indirectly to normal wear and
tear, misuse, use not for the intended purpose or use not in accordance with the product manual, abuse, accident,
rental, modification or alteration, unauthorized repair, improper installation, neglect, failure to perform or improper
performance of maintenance, or any other failure not arising from defective materials or workmanship. Fraudulent
returns or claims will be denied. The repair or replacement described in this warranty shall be your sole and
exclusive remedy. THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS WARRANTIES,
WRITTEN OR ORAL, AND ANY IMPLIED WARRANTIES ARE DISCLAIMED TO THE EXTENT PERMITTED
BY LAW AND OTHERWISE LIMITED TO THE DURATION OF THE EXPRESS WARRANTY HEREIN. HARBOR
FREIGHT SHALL NOT BE LIABLE UNDER ANY CIRCUMSTANCES FOR ANY INCIDENTAL, INDIRECT,
SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES OR COSTS ARISING FROM THIS WARRANTY
OR THE USE OF THIS PRODUCT. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN
IMPLIED WARRANTY LASTS OR THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL
DAMAGES, SO THESE LIMITATIONS MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC
LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
TM
