The pendulum movement on most of the grandfather clocks are fully adjustable to make the clock run faster or slower.  All grandfather clocks on this site are  handcrafted with care that will easily add beauty to your house. All clocks come with a 1 year warranty. All clocks come with satisfaction guarantee.If you are not satisfied call me at (209) 478-0195 within ten days and your money will be refunded less shipping. All clocks come with free shipping so the price you see is the price you pay .