Toolbox Caster Set 4in for Greenlee Knaack and Job Boxes - Heavy Duty

In this review the Toolbox Caster Set 4in from SES is evaluated for tradespeople and facilities managers who need a durable replacement caster kit for Greenlee, Knaack and similar job boxes. The bottom line: this kit is for anyone who wants a heavy duty, ready-to-install option that replaces worn OEM casters and restores smooth mobility to toolboxes. The most compelling reason to buy is the kit's combined focus on capacity and hardware completeness: with heavy duty polyurethane wheels and all mounting hardware included, the set arrives ready to fit and perform.

Key Features

• 2,800 lb capacity per set: Provides a high load capacity so a loaded toolbox can be moved confidently without stressing the casters.
• Heavy duty polyurethane wheels: Offer long wear and resistance to flat spots while rolling smoothly across concrete and shop floors.
• Double row ball bearing swivel raceway: Delivers stronger swivel performance and reduced binding when turning a loaded box.
• Standard mounting plate: The 4x4-1/2 plate with slotted bolt holes fits common bolt patterns and simplifies installation on Greenlee and Knaack boxes.
• All mounting hardware included: Comes with both self-tapping and carriage bolts plus washers and lock nuts so installers have the correct fasteners for different mounting scenarios.

Who It's For

This caster kit suits electricians, contractors, shop owners and maintenance teams who need a robust, drop-in replacement for worn casters on job boxes. Because the kit includes both swivel and rigid casters along with a full complement of fasteners, it is especially useful for field repairs or on-site upgrades where sourcing hardware separately would slow the job.

Those who should look elsewhere include owners of unusually small or nonstandard boxes that do not match the plate or slotted hole spacing, and users who require specialty wheel compounds for delicate flooring. For most industrial and trade toolboxes the set is a practical, ready-made option.

Pros & Cons

Pros

• High total capacity for a four-caster kit makes it suitable for heavily loaded toolboxes.
• Included hardware simplifies installation and avoids trips to the parts store.
• Polyurethane wheels with roller bearings provide smooth rolling and good wear resistance.

Cons

• Mounting plate is a standard 4x4-1/2 size and may not match very old or custom boxes without drilling or adapter plates.

Specifications

Brand	SES CASTERS STANLEY E. SMITH COMPANY
Wheel size	4in x 2in polyurethane
Kit contents	2 swivel and 2 rigid casters plus full mounting hardware
Mounting plate	Standard 4 x 4-1/2 with slotted to 3 x 3 bolt spacing
Hardware included	3/8-16x1in self-tapping bolts, 3/8-16x1in carriage bolts, 3/8in fender washers, 3/8-16 lock nuts (16 each)
Load capacity	2,800 lbs per set

Our Verdict

The SES Toolbox Caster Set 4in is a practical, value-focused replacement for standard job box casters. It is best for tradespeople who need a durable, easy-to-install solution that restores mobility and handles heavy loads, and the included hardware removes friction from the repair process. For most Greenlee and Knaack owners this kit offers solid performance at a sensible cost.

Frequently Asked Questions

Will these casters fit my Greenlee box?
They fit most Greenlee and Knaack boxes that accept a 4 x 4-1/2 mounting plate with slotted hole spacing; check your plate pattern against the listed slotted spacing before purchase.

Is all mounting hardware really included?
Yes, the kit includes both 3/8-16x1in self-tapping and carriage bolts, 3/8in fender washers and 3/8-16 lock-nuts (16 pieces of each) so installers have the necessary fasteners.

How durable are the wheels?
The wheels are heavy duty polyurethane with roller bearings, which provides good wear resistance and smooth rolling in typical workshop and jobsite conditions.