 Slow lorises have a powerful grasp with both their hands and feet due to several specializations . They can tightly grasp branches with little effort because of a special muscular arrangement in their hands and feet , where the thumb diverges at nearly 180 ° from the rest of the fingers , while the hallux ( big toe ) ranges between being perpendicular and pointing slightly backwards . The toes have a large flexor muscle that originates on the lower end of the thigh bone , which helps to impart a strong grasping ability to the hind limbs . The second digit of the hand is short compared to the other digits , while on the foot , the fourth toe is the longest . The sturdy thumb helps to act like a clamp when digits three , four , and five grasp the opposite side of a tree branch . This gives their hands and feet a pincer @-@ like appearance . The strong grip can be held for hours without losing sensation due to the presence of a rete mirabile ( network of capillaries ) , a trait shared among all lorises . Both slender and slow lorises have relatively short feet . Like nearly all lemuriforms , they have a grooming claw on the second toe of each foot . 
