This Speed Shift is full of surprises with its adjustable quick release tab and seventeen different size adjustments. You never have to worry about this ring not fitting; you just simply change the tab, so it truly is one size fits all. Not to mention if you have a friend over, you don't have to go digging through your closet to find one that fits; this one will do the trick. The ball rope works in combination with the ball guide to allow easy adjusting of the ring while in use. The .2 inch increments are designed so that every man can get the perfect fitting ring. Combined with a quick release tab, this product is ideal for first timers and individuals who are looking for an easy to use ring. When you put some lube on the ring, it helps it slide through the tabs. So as your penis gets harder, just easily adjust the ring and you will always have the perfect fit! The Speed Shift is safe with water based lubes. Wash thoroughly with mild soap and water. Perfect Fit Brand Products are sold, and intended for use strictly as adult novelty toys for entertainment. They are not intended for medical use and have not been clinically tested. No medical claims are warranted or implied by the use of these products. Carefully made of PE inner core with a soft rubber overmold, the product is exceptionally well made.