EXTRA or REPLACEMENT PARTS - Keep a cam lock on hand if you need an extra. PERFECT SIZE - 7/8" to 3/4" Cam-Lock Collar. Fits on Vico Marine Support Poles: 28" to 47", 18" to 33", 34" to 59", 39" to 70" DURABLE - Aluminum with 316 stainless components. USA BASED - Vico Marine is a division of Vico Plastics located in Wisconsin. Cam-Lock Collar 7/8" to 3/4" - Aluminum with 316 Stainless Components Fits on Vico Marine Support Poles: 28" to 47", 18" to 33", 34" to 59", 39" to 70"