What is the difference between a frame lock and a liner lock?

A frame lock uses the handle material itself to lock the blade open, while a liner lock uses a separate steel insert inside the handle. Frame locks are typically stronger and require fewer parts, which reduces weight and simplifies construction.

Can I sharpen M390 steel at home?

M390 is a high-hardness steel that holds an edge for a long time but is more difficult to sharpen than softer steels. You will need diamond stones or ceramic rods rather than standard whetstones, and sharpening takes more time and effort.

What does deep carry mean?

A deep-carry pocket clip positions the knife lower in your pocket so that only a small portion of the handle extends above the pocket opening. This keeps the knife more concealed and reduces the chance of it snagging on fabric or other objects.

How do ceramic ball bearings improve a folding knife?

Ceramic ball bearings reduce friction at the pivot point, which makes the blade swing open more smoothly and with less effort compared to knives that use washers. They also resist wear and corrosion better than steel bearings.

Is the pocket clip reversible for left or right hand carry?

Yes, the pocket clip can be reversed for tip-up or tip-down carry, which allows you to configure the knife for either left or right hand use depending on your preference.

Ti Pocket Knife II

ceramic
Lifetime warranty

The 3-second version

M390 blade steel hardened to 60 HRC for edge retention
Grade 5 titanium handle keeps weight down without sacrificing strength
Ceramic ball bearing pivot reduces friction during deployment
Compact size may not suit all tasks
Frame lock requires deliberate release
M390 steel is harder to sharpen at home

Why it's on GiftsFeed

Frame-lock folder built from grade 5 titanium and M390 steel

Most folding knives in this price range use liner-lock construction with separate steel liners inside the handle scales, adding screws and weight. This one uses the titanium frame itself as the lock, eliminating extra parts and bringing the screw count down to two. That makes it lighter in your pocket and faster to take apart when you need to clean or adjust it.

The ceramic ball bearing pivot is the practical difference. Budget folders use washers, which create drag every time you flip the blade open. Bearings let the blade swing freely with less effort, and the inline flipper gives you a clean opening method that disappears into the handle once deployed. If you carry a knife daily and open it often, that smoother action is worth the step up.

Good gift when

Daily carry users who want titanium construction without excess weight
People who prefer frame-lock folders over liner locks
Anyone who values easy disassembly for cleaning and maintenance
Users who appreciate M390 steel for edge retention

Skip it if You need a larger blade or prefer a full-sized knife over a pocket folder

Specs

Blade Steel: M390
Blade Hardness: 60 HRC
Blade Profile: Modified Drop Point (Flat Grind)
Sharpening Angle: 45 degrees
Handle Material: Grade 5 Titanium
Pocket Clip Material: Grade 4 Titanium
Pivot Type: Caged Ceramic Ball Bearing
Lock Type: Frame Lock
Deployment: Inline Flipper + Dual Thumb Studs
Screw Count: Two (pivot and pocket clip)
Pocket Clip: Deep Carry, Reversible
Lanyard Hole: Integrated
Warranty: Lifetime

What's included

Ti Pocket Knife II
Reversible deep-carry pocket clip (attached)

If you're giving it

No sizing to guess

Check local knife laws before gifting, as regulations vary by location.

The maker

Big Idea Design builds tools that strip away unnecessary complexity. The company focuses on everyday carry items engineered for durability and ease of maintenance, using materials like titanium and high-grade steel that resist corrosion and stand up to repeated use.

The Ti Pocket Knife II reflects that approach. By using the titanium frame as the lock mechanism and limiting the design to two screws, the knife eliminates the extra hardware and layered construction found in many folding knives. The result is a lighter, simpler tool that still delivers the performance expected from premium materials like M390 blade steel and ceramic ball bearings.

The details

This folding knife uses a frame-lock mechanism with a single-piece titanium scale on each side, held together by only two screws: one for the main pivot and one for the pocket clip. The blade is M390 steel with a modified drop point profile and flat grind, hardened to 60 HRC and sharpened at 45 degrees. The handle is machined from grade 5 titanium, while the deep-carry reversible pocket clip is grade 4 titanium.

The pivot runs on caged ceramic ball bearings, which reduce friction during opening and closing. You can deploy the blade using either the inline flipper tab or the dual thumb studs. The inline flipper sits flush with the handle when the knife is open, keeping the profile clean. The thumb studs offer an alternative method that works from either side.

The frame lock holds the blade open by using a section of the titanium handle that springs into place behind the blade tang. To close, you press the lock bar aside and fold the blade back into the handle. The deep-carry clip positions the knife low in your pocket so that only a small portion of the handle shows above the rim, and you can reverse it for tip-up or tip-down carry. An integrated lanyard hole provides another carry option.

The combination of grade 5 titanium and M390 steel delivers edge retention and corrosion resistance while keeping the overall weight down. The two-screw construction simplifies maintenance and disassembly. A lifetime warranty covers the knife.

Big Idea Design

Ti Pocket Knife II

Ceramic ball bearing pivot, inline flipper, and deep-carry clip in a two-screw design

$295at bigidesign.com

Quantity

Buy from Big Idea Design

Ships and sold by Big Idea Design. About this merchant

The 3-second version

M390 blade steel hardened to 60 HRC for edge retention
Grade 5 titanium handle keeps weight down without sacrificing strength
Ceramic ball bearing pivot reduces friction during deployment
Compact size may not suit all tasks
Frame lock requires deliberate release
M390 steel is harder to sharpen at home

Cheaper alternatives

Questions

What is the difference between a frame lock and a liner lock?: A frame lock uses the handle material itself to lock the blade open, while a liner lock uses a separate steel insert inside the handle. Frame locks are typically stronger and require fewer parts, which reduces weight and simplifies construction.
Can I sharpen M390 steel at home?: M390 is a high-hardness steel that holds an edge for a long time but is more difficult to sharpen than softer steels. You will need diamond stones or ceramic rods rather than standard whetstones, and sharpening takes more time and effort.
What does deep carry mean?: A deep-carry pocket clip positions the knife lower in your pocket so that only a small portion of the handle extends above the pocket opening. This keeps the knife more concealed and reduces the chance of it snagging on fabric or other objects.
How do ceramic ball bearings improve a folding knife?: Ceramic ball bearings reduce friction at the pivot point, which makes the blade swing open more smoothly and with less effort compared to knives that use washers. They also resist wear and corrosion better than steel bearings.
Is the pocket clip reversible for left or right hand carry?: Yes, the pocket clip can be reversed for tip-up or tip-down carry, which allows you to configure the knife for either left or right hand use depending on your preference.