The present invention is an apparatus for trimming plants, in particular, buds and flowers, to remove unwanted plant material. The solder coating on the side surfaces of the terminals protects the terminals from oxidation due to aging and subsequent processes. The polymerization degree of the polyvinyl alcohol is ranging from 900 to 1100 and the saponification degree is ranging from 86 mol % to 90 mol %. This allows easy and precise positioning and bonding of the objects. A method for removably attaching a wheel using the disclosed wheel assembly is also disclosed. The pacing rate is then increased and maintained to be above the intrinsic cardiac rate.