The Spear & Jackson SJ1750 is an all-metal body utility folding knife with a soft-feel handle and quick-change blade mechanism. Comes with 10 spare blades included, so you can keep working without hunting around for replacements.
The Spear & Jackson SJ1750 is a well-built utility folding knife aimed at tradespeople and site workers who need something reliable in their pocket without the bulk of a fixed-blade knife. The all-metal body gives it the kind of solidity that cheaper plastic-handled folders simply don’t, and the soft-feel grip means it stays comfortable in the hand even on longer cutting sessions. If you’ve been looking for a utility folding knife that feels like it’s worth carrying every day, this is a reasonable place to start.
It comes with 10 spare blades in the box, which is a decent shout at this price point. Most folding knives in this range are sold blade-dry, leaving you to source replacements separately. The SJ1750 skips that inconvenience and gives you enough blades to keep going for a good while before you need to reorder.
What Makes the SJ1750 Folding Knife Worth Carrying
The quick blade change mechanism is straightforward and keeps swap time down on site. No fumbling about, no needing a separate tool to release the blade. The stable back lock holds the blade firmly open during use, which matters when you’re cutting through packaging strapping, insulation, or membrane material and you don’t want any unexpected movement. A folding knife that wobbles at the pivot is a folding knife that ends up at the back of a drawer.
The blade format is the standard trapezoid utility blade, compatible with most spare blade packs on the market. So when your included 10 are done, you’re not hunting for a proprietary replacement. Standard blades are available everywhere, which is exactly how it should be.
Build and Handling
The all-metal body keeps the knife compact but substantial. It doesn’t rattle, it doesn’t flex, and it sits flat in a work trouser pocket without the awkward bulk of a larger retractable. The soft-feel handle overlay gives enough grip that it won’t slip in a gloved hand, which is one of those details that sounds minor until you’ve dropped a knife into a cavity wall or down a roof pitch. The SJ1750 is a sensible daily carry for decorators, roofers, joiners, electricians, or anyone who reaches for a knife several times a day and wants it to just work.
Spear & Jackson as a brand has been making hand tools long enough that a knife bearing their name isn’t going to embarrass you on site. The SJ1750 reflects that: nothing flashy, nothing gimmicky, just a utility folding knife that does what it says.
At this price, with 10 blades in the box, the SJ1750 is a practical choice whether you’re replacing a worn-out folder or picking up a spare to leave in the van. It’s the kind of purchase you won’t spend much time thinking about, which is usually the sign that a tool has got it right.
Pro Tip: When the blade starts dragging rather than cutting cleanly, swap it out straight away. A dull blade needs more force, and more force on a folding knife is where accidents happen.
The Spear & Jackson SJ1750 folding knife is used across a wide range of trades wherever a compact cutting tool is needed day to day. Roofers use it for trimming felt and membrane, decorators reach for it when opening sealant boxes or scoring surfaces, and electricians use it for stripping cable sheathing or cutting trunking insulation. Joiners, shopfitters, and general builders all tend to keep a folder in the pocket as a first-reach cutting tool before pulling out anything larger.
Best For
Trimming roofing membrane and felt
Cutting cable sheathing and insulation
Opening packaging and strapping on site
Scoring and marking materials
General trade daily carry
Works With
Standard trapezoid utility blades
10 spare blades included in the box
Compatible with most universal blade packs
Key Features
All-metal body construction
Soft-feel handle grip
Quick blade change mechanism
Stable back lock when open
Compact and pocket-friendly profile
10 spare blades included
Not suitable for: Not suitable for heavy-duty cutting tasks that require a fixed-blade or retractable Stanley-type knife. The folding format is not ideal for prolonged cutting of thick materials such as rigid insulation board or dense foam.
Open the SJ1750 fully until the back lock engages. Check the blade is seated firmly before cutting. Use smooth, controlled strokes rather than forcing the blade through material, which extends blade life and keeps cuts clean.
To change the blade, disengage the back lock and fold the knife closed. Release the blade using the quick-change mechanism and fit a fresh blade from the included pack. Always dispose of used blades safely, ideally in a dedicated blade tin or sharps container, not loose in a bag or toolbox.
Open the knife fully until the back lock clicks into place
Check the blade is secure and seated correctly before use
Cut using steady, controlled strokes appropriate to the material
When the blade dulls, close the knife and disengage the back lock
Remove the old blade using the quick-change mechanism
Fit a fresh blade from the included pack and confirm it is locked in place
Dispose of used blades in a sharps tin or dedicated blade disposal box
What type of blades does the SJ1750 use?
The SJ1750 takes standard trapezoid utility blades, which are the most common format available. The knife comes with 10 spare blades included, and when those run out, any standard utility blade pack from a hardware or trade supplier will be compatible.
Is the blade lock safe to use with gloves on?
Yes. The stable back lock holds the blade firmly open during use and is straightforward to operate. The soft-feel handle also provides enough grip to use comfortably in work gloves without the knife slipping in your hand.
Can I carry this in a work trouser pocket?
The SJ1750 is designed with a compact, flat profile that makes it suitable for carrying in a work trouser pocket. The all-metal body keeps it slim without adding unnecessary bulk, and the folding design removes any safety concerns with an exposed blade.
The Spear & Jackson SJ1750 features an all-metal body construction with a soft-feel handle overlay for grip comfort. The blade format is the standard trapezoid utility blade, held in place by a quick-change mechanism and secured during use by a stable back lock. The knife is supplied with 10 spare blades as standard. No specific steel grade or blade hardness rating is stated by the manufacturer.
Model
SJ1750
Brand
Spear & Jackson
Body Material
All-metal
Handle
Soft-feel grip
Blade Type
Standard trapezoid utility blade
Blade Lock
Stable back lock
Blade Change
Quick-change mechanism
Blades Included
10
Knife Style
Folding
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