1The wood rods are round, burrfree and flat at the bottom, painted red and green respectively. 2Smoothly surface and antislip, do not scratch hands, made of wood material free from harmful substances. 3The bottom hole is evenly distributed in the same depth, the stick will not move, convenient to use. 4Special designed for enhancing the control ability of fingers and upper limbs, improve handeye coordination. 5There are 3 different sizes finger training wood board available, you can choose according to your demands.