When trolling spreads tighten up for salmon, walleye, or trout and hardware takes constant adjustment, Cisco Replacement Thumbscrews lock mounts down with confidence and control. These heavy-duty thumbscrews come CNC machined from solid stainless steel and feature a fully knurled top that delivers a strong, slip-free grip during on-the-water changes. Standard 1/4-20 threads fit a wide range of Cisco mounts, while included synthetic polymer washers sit at the top of the threaded shaft to protect anodized surfaces from scratches. Multiple lengths cover popular Cisco gear, keeping rod holders, electronics, and track systems secure in rough water. CNC-machined stainless steel thumbscrews with knurled tops 1/4-20 threaded with synthetic polymer washers to prevent surface damage Popular Cisco gear for size: 1/2 inch: Single track mounts, Single thumbscrew mounts and Sure-Lok electronic mounts 5/8 inch: Single thumbscrew Rail Mount (7/8 in. handrail) 3/4 inch: Multi-thumbscrew mount, Multi-track mount Quantity per pack: 4 Made in the USA