Which tool is a sliding square mounted on a steel rule, used to mark a square line, find level, or measure?

Which tool is a sliding square mounted on a steel rule, used to mark a square line, find level, or measure?

• A. Combination Square
• B. Try Square
• C. Chisel
• D. Marking Knife

Answer: (A)

A sliding square mounted on a steel rule used to mark a square line, find level, or measure is a combination square. Its key feature is a steel rule with a head that can slide along it and be clamped at any position. The head typically provides 90° and 45° angles, allowing you to lay out square lines and check right angles, while the ruler carries precise measurements. Many versions also include a built-in spirit level, so you can assess level or plumb directly. This combination of adjustable positioning, multiple angles, and measurement makes it a very versatile layout tool for woodworking and metalworking. A try square is a fixed-angle tool used to check or mark a right angle but it doesn’t slide along a rule or include a level. A chisel is a cutting tool, and a marking knife is used to scratch lines but doesn’t offer the adjustable measurement and level features.

A sliding square mounted on a steel rule used to mark a square line, find level, or measure is a combination square. Its key feature is a steel rule with a head that can slide along it and be clamped at any position. The head typically provides 90° and 45° angles, allowing you to lay out square lines and check right angles, while the ruler carries precise measurements. Many versions also include a built-in spirit level, so you can assess level or plumb directly. This combination of adjustable positioning, multiple angles, and measurement makes it a very versatile layout tool for woodworking and metalworking.

A try square is a fixed-angle tool used to check or mark a right angle but it doesn’t slide along a rule or include a level. A chisel is a cutting tool, and a marking knife is used to scratch lines but doesn’t offer the adjustable measurement and level features.