they can also replace knobs on roof racks for skis
HB end controls
Apply evenly with a clean cloth to a small area in a circular motion while polish is wet
thread pitch 11-1/2 NPSM straight
3 different positions exist for a better adaptation of the mainsail and wind conditions
Schaefer 5 Series Halyard Lift Turning Block / Delrin BB Inverters they can also replace knobs5 Series Halyard Lift Turning Block Delrin BB 506 60 506 60 Ball Bearing Halyard Control Block. Delrin(tm) ball bearing sheave ensures low friction yet high strength. Anodized aluminum cheeks with Stainless steel base provide a solid platform. Ball bearing sheave is ideal for control lines under regular adjustment. Sheave Dia. 2, (51 mm), Max Line 7 16, (11 mm), Jaw Opening 2 9 32, (58 mm), Pin. Dia. 1 5 16, (49 mm), Length 2 9 16, (65mm), Width 5 8,