BESSEY EHK SERIES – 600 lb Clamping Force – 18 in – EHKXL18 Trigger Clamp Set – 3.625 in. MPN: EHKXL18. Model Number: EHKXL18. Manufacturer Part Number: EHKXL18. Strong and Durable – BESSEY bar construction makes for a secure and sturdy product that you can rely on regardless if you choose our 100, 300, or 600 lb of force option.