Light Tension: Ideal for shallow water trolling and for light hitting fish. Attach the clip to the downrigger weight and place the line in the pad. Soft pads won't damage or fray line. Medium Tension: Firm tension to reduce false releases due to line drag when fishing deep. Attach the clip to weight and place the line in the pad. Soft pads won't damage or fray line. Heavy Tension:Very firm spring tension to withstand large lures and high speed trolling common in saltwater fishing. Has a beefed up, 18" - 210# stainless steel leader and heavy-duty 2/0 snap. Great for trolling with cowbells and dodgers.