Aquaterior Simple Designed Single-hole Faucet, easy to maintain as well as creating a clutter-free bathroom atmosphere Compatible with under-mount sink or above counter sink with 1 or 3 holes; Tool-free Installation within Minutes, features unique Square Nut for fast DIY installation Durable & Leak-free: Upgraded Ceramic Cartridge, supports 500,000 times of opening & closing (commonly 300,000 times in the market), tough enough to survive frequent use in daily life; Brass Body - Adjustable Water Temperature & Flow Rate (2.2 GPM at 60 PSI max flow rate), easy to operate with Single Lever for effortless flow and precise temperature control as season changes CUPC & NSF certificated & 5 years after-sale protection, easy & fast replacement is offered for quality issue