Aftco Guides line of Super Heavy Duty roller guides feature rugged, roomy frames with unequaled knot clearance. Rollers and bearings are extra large and tough to endure the special punishment of this heaviest class. Aflon, an exclusive Teflon formulation, is bonded to all bearings to provide lasting lubrication and protection. Aftco's Super Heavy Duty roller guides feature oversized feet that are precisely formed to match the contours of the blank and grip the rod with exceptional strength. The edges are feathered to allow winding thread to climb over the feet easily. The Big Foot Super Heavy Duty roller tip-tops are a perfect match for these guides.