With the flick of the lever, Bob's Machine Quick Slip for Trolling Motors makes depth adjustments quick and easy. Move the lever in either direction, and this boating accessory releases the motor for adjustments. Turn it back to the center, and it applies rock-solid pressure to hold even the biggest unit securely in place. Bob's Machine Quick Slip replaces your standard knob, and it features a simple 1-minute installation. Makes depth adjustments quick and easy. Move lever in either direction to release. Center lever to apply rock-solid pressure. Holds the biggest units in place. Replaces standard knobs. Simple installation. Item(s) will ship directly from manufacturer; delivery options and/or shipping upgrades are unavailable. Please allow 2-3 weeks for delivery. Contiguous 48 states only. A street address is required for delivery. Item is not available for ship-to-store delivery.