The price is primarily driven by load capacity (kN) and accuracy class. For B2B procurement, ensure the device offers an accuracy of ±1% or better of the indicated load. Key components include a high-precision hydraulic cylinder, a digital pressure gauge with peak hold function, and interchangeable adapters for different fastener types (e.g., rebar, anchors, or bolts). High-end models often feature Bluetooth data export and internal memory for automated reporting, which increases the initial cost but reduces labor time.