Rubber pan is made of special materials and it has good elasticity and recoverability ,also it’s ve ry easy to adjust; Blade height is adjustable; Perfect fitting between the central hole of the blade and the shaft , no need to change the height for each time end face adjustment; The shaft of blade is located accurately, and it’s no need to adjust the height when change the blade face each time; Durable and ease to use; Long life blade, no less than 48000 operation times.