Applicable to Many Rigs: This product is a versatile fishing knot tying tool. It can be used for hooks from size #28 to 4/0, and also for tying knots on other rigs, such as swivels, jig heads, and snap swivels. Protect Hands from Hook Points: Every angler has experienced being punctured by a sharp hook point when tying a knot. This product covers the sharp hook point and barb, helping you tie all kinds of knots safely and easily. Transport Rigged Fishing Rods Safely: With the hooks covered, you can safely transport your fully rigged fishing setups. It prevents damage to your car, boat, and upholstery. More importantly, it protects children and pets from being injured by the sharp hooks. Simple and Convenient to Use: Compact and portable, it can even be placed in a tackle box. You can tie a knot with hook protection anywhere, such as at home, on the boat/kayak, or on the beach. All Fishing Conditions: This product can be used in all types of conditions, in both freshwater and saltwater, and in all weather conditions.