CISNO Baitcasting Fishing Reel 11BB 6.3:1 10+1 Shielded Bearings Baitcaster Right Hand for Casting Rod The adjustable spool tension knob control the spool tension accurately to avoid the backlash.Low profile design bait caster with a super silent high speed 6.3:1 line retrieve. 10 + 1 shielded MaxiDur corrosion resistant ball bearings for super smooth casting, retrieve, and long life. You can adjust from 0(none) to 10 (highest) to get the perfect tension according to the weight of lures/bait you use. This allows almost limitless adjustability to handle any fishing situation and makes the cast more accurately. CNC machine cut aluminum spool and double brass ratch; anti-corrosion stainless steel main shaft and components. Fights stronger, lasts longer. Two color anodized aluminum forged multi-ported whiffle-style spool offers maximum strength while reducing weight.