
BLACK+DECKER BDL220S
Score: 65/100
Klein Tools 935AB4V Magnetic Torpedo Level
Score: 88/100Rankings

The Klein Tools 935AB4V is a 6.25-inch ACCU-BEND magnetic torpedo level designed for electricians and tradespeople to achieve precise leveling on conduit, pipe, and metal surfaces. It features a durable aluminum body, four multi-angle vials, and powerful rare-earth magnets with a patented track. Best suited for electricians and plumbers needing precise angles on pipe and conduit.

The BLACK+DECKER BDL220S is a compact line laser designed for indoor DIY tasks like hanging pictures, featuring a 360-degree rotating wall attachment. Its primary limitation is the lack of true self-leveling capabilities, requiring manual bubble alignment. It is best suited for casual users performing light decor tasks in small spaces.
| Attribute | ![]() | ![]() |
|---|---|---|
7 inchesbest | 6.25 inches | |
2 | 4best | |
2.6 inchesbest | 1.476 inches | |
6.5 inchesbest | 0.75 inches | |
| ↓ lower better | 0.44 lbs | 0.36 lbsbest |
2 yearsbest | 1 years |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Performance & Accuracy(1) | ||
Accuracy | ±3 mm at 10 feet | 0.029 |
Dimensions & Size(4) | ||
Length (inches) | 7.0 inches | 6.25 inches |
Width (inches) | 2.6 inches | 1.476 inches |
Height (inches) | 6.5 inches | 0.75 inches |
Weight (lbs) | 0.44 lbs | 0.36 lbs |
Build & Durability(1) | ||
Frame Material | Plastic/Metal | Aluminum |
Warranty & Support(1) | ||
Warranty Period (years) | 2 years | 1 years |
Features & Functionality(4) | ||
Vial Count | 2 | 4 |
Level Type | Line Laser | Torpedo |
Magnetic Base | false | true |
V-Groove | false | true |

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

Professional reviewers acknowledge the tool's utility for basic DIY hanging tasks but strongly criticize the 'self-leveling' label as deceptive because the device lacks a pendulum.
Everyday users generally find the device simple and effective for hanging decor, but recurring complaints focus on the misleading 'self-leveling' marketing and short range.




Professional reviewers and editors praise the 935AB4V as a top-tier conduit level, highlighting its strong magnets, compact design, and multi-angle vials. Editors specifically recommend it for professional use due to its role in simplifying conduit bending.
Everyday users consistently praise the powerful magnets, accuracy, and durability of the level, noting that it stays put on conduit during bends and survives jobsite abuse. Common praise includes the compact size for pocket storage and clear vials for quick reads.