Specially Designed Plastic Window Cranks w/Round Knobs These are 3/4" Shaft Round Knobs with a 3" Shaft Extension Knob and Extension are Designed to be Used Without a Screw Knob and Extension Come Assembled Replaces 3 3/16" Plastic Window Cranks Tired of Walking Into A Crank Handle Sticking Out? Have a Hard Time Opening Your Window? Round Knob Provides Greater Torque With Less Effort To Open Windows Especially Larger Sizes Very Effective & Helpful For People With Arthritis Or Weak Hand/Arm Strength Splines Fit Mobile Home Window Operators 3 3/4" Shaft Length |