Product features - made with TPR material, light weight and non-toxic - anti-slip sturdy grip tested to hold even heaviest door in any position - effectively fits all doors with >0. 1 Inch gap from floor - effective safety for injuries to little finger and accidental lockups - no installation required - completely reusable how to use. Multi surface door stopper can be positioned on any surface and in any position to hold the door. Insert the door wedge under the door, preferably, towards the outer edge of the door (opposite side to the hinge). Insert from and place the elevated portion towards the closing direction of the door. The firm grip of the wedge will not let child close the door or play with it. To close: simply remove the door wedge caution and tips. This product is not a toy, and not a substitute for adult supervision. This is not a tether and chewing on it by the child must be avoided. Product works best on high friction surfaces like carpets. You may use two stoppers simultaneously from opposition direction to hold the door in a specific position. Consult baby safety experts for right finger protector for your door. You may want to discontinue the use of product after your child has reached an age where he/she can remove it alone.