
Klein Tools Folding Jab Saw
Score: 88/100
Craftsman CMHT20138
Score: 75/100Rankings

The Klein Tools 31737 is a compact, folding jab saw designed for drywall and construction work, featuring a hardened carbon steel blade that folds into a comfort-grip handle. It offers bidirectional cutting with triple-ground teeth and a versatile lockback mechanism with positions at 125 and 180 degrees for use in tight spaces. It is ideal for professionals prioritizing portability and bag safety over maximum blade length.

The Craftsman CMHT20138 is a 12-inch solid frame hacksaw designed for cutting plastic, wood, and metal with a 24 TPI carbon steel blade. Its adjustable angles and sturdy metal frame make it reliable for basic hacksaw tasks and flush cuts. It is best suited for DIY users and homeowners needing a durable, affordable hacksaw for straight cuts.
| Attribute | ![]() | ![]() |
|---|---|---|
5.2 inches | 12 inchesbest | |
8 TPI | 24 TPIbest | |
| ↓ lower better | 0.538 lbsbest | 1.3 lbs |
11.9 inches | 15.75 inchesbest | |
— | 0.76 mmbest | |
— | 0.5 inchesbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Handle & Ergonomics(2) | ||
Handle Material | Plastic with rubber grips | Plastic |
Handle Type | Cushioned Palm | D-Handle |
Dimensions & Weight(2) | ||
Weight (lbs) | 0.5375 lbs | 1.30 lbs |
Overall Length (inches) | 11.9 inches | 15.75 inches |
Performance & Usage(4) | ||
Intended Use | Drywall, wallboard, plywood, plastic | Multi-Material |
Saw Type | Folding Jab Saw | Hacksaw |
Cutting Action | Bidirectional | Push |
Suitable Materials | Drywall, Plywood, Plastic | Multi-Material |
Blade Specifications(3) | ||
Blade Length (inches) | 5.2 inches | 12 inches |
Teeth Per Inch (TPI) (TPI) | 8 TPI | 24 TPI |
Blade Material | Hardened carbon steel | Carbon Steel |
Build & Durability(2) | ||
Blade Coating | Triple Ground | None |
Replaceable Blade | false | true |
General(1) | ||
Warranty | 1 year | Lifetime |

Products in the top-left offer the best value (high score, low price).

Professional reviewers and editors consistently rate the Klein Tools 31737 highly, noting its innovation in storage safety and cutting efficiency. Editors highlight that the blade is as sturdy as fixed-blade alternatives while offering the convenience of a folding design.
Everyday users and contractors express strong satisfaction with the product's ability to cut drywall smoothly and protect tool bags from damage. Common praise focuses on the comfortable grip, the utility of the 125-degree angle for corners, and the convenience of the tether hole for ladder work.

“Blade cuts smooth through drywall like butter-folds perfectly, no more ripped bags”

“Love the 125° angle for corners; grip is comfy for hours”

“Sturdy lockback, lightweight, tether hole is a game-changer on ladders”




No in-depth expert reviews or editorials were found in the search results. Retail listings highlight the high-strength frame, 225 lb tension capacity, and comfort features as reliable for basic hacksaw tasks.
Consumer feedback is minimal, with high ratings from sparse reviews. Common praise centers on the sturdy build and comfortable grip, with no recurring complaints noted in the available data.