This 3?? boat latch is designed to replace a 3 inch bow roller on a Rangers, Stratos or similar style boats. With this model we have only added one support roller to our 3 inch model. The roller provides added support and helps the nose or bow of the boat roll off our closure during launch. If the nose or bow of your boat drops during launch, the support roller and is necessary for our system to function properly on your trailer. Measure the inside of your roller tie on your trailer and make sure it is 3 inches wide before ordering. The latch is made of a heavy gauge steel and weighs in at 10lbs. It is resistant. The 2-piece arm is included with your purchase. The 3-inch model for Ranger and Stratos only comes in a powder coated, black version (black). If the specifications of your roller bracket width are 3 – please refer to wider or 3/4 inches to 3 – 3/4 inch model. **Note** This will not work on pontoons or flat bottom boats. This model is designed specifically for Ranger and V-Front style boats, but will work on most Stratos style boats as well.