
The Story
Johnson 300mm H D Stainless Steel Combination Square is a versatile tool designed for precise measurements and layout lines in various trades including woodworking, stonemasonry, and metalworking.
This combination square features a CNC-machined square head that ensures layout lines are square to the edges, making it suitable for multiple applications such as a machinist's square, straightedge, adjustable try square, mitre square, marking gauge, and depth gauge. The Auto-Lock™ blade assembly and hardened, screw-in scriber enhance its usability, while the durable acrylic vial ensures accurate readings. Manufactured in the USA, this tool is essential for tradesmen seeking reliability and precision in their work.
Features
- Auto-Lock™ blade assembly for secure measurements
- Hardened, screw-in scriber that remains securely in place
- Durable acrylic vial for accurate level readings
- CNC machined square head for enhanced accuracy
- Versatile tool for woodworking, stonemasonry, and metalworking
Specifications
| Dimensions (W x H x D) | 152mm x 98mm x 330mm |
| Weight | 0.325kg |
| Material | Stainless Steel |
| Model Number | 400M-SD |
| Volume/Size | 300mm |
The Johnson 300mm H D Stainless Steel Combination Square is designed for accuracy and durability in various applications.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
Johnson 300mm H D Stainless Steel Combination Square is a versatile tool designed for precise measurements and layout lines in various trades including woodworking, stonemasonry, and metalworking.
This combination square features a CNC-machined square head that ensures layout lines are square to the edges, making it suitable for multiple applications such as a machinist's square, straightedge, adjustable try square, mitre square, marking gauge, and depth gauge. The Auto-Lock™ blade assembly and hardened, screw-in scriber enhance its usability, while the durable acrylic vial ensures accurate readings. Manufactured in the USA, this tool is essential for tradesmen seeking reliability and precision in their work.
Features
- Auto-Lock™ blade assembly for secure measurements
- Hardened, screw-in scriber that remains securely in place
- Durable acrylic vial for accurate level readings
- CNC machined square head for enhanced accuracy
- Versatile tool for woodworking, stonemasonry, and metalworking
Specifications
| Dimensions (W x H x D) | 152mm x 98mm x 330mm |
| Weight | 0.325kg |
| Material | Stainless Steel |
| Model Number | 400M-SD |
| Volume/Size | 300mm |
The Johnson 300mm H D Stainless Steel Combination Square is designed for accuracy and durability in various applications.











