The Orthobloc DYNABLOC has a standard angular backlash which covers 10 to 30 minutes, varying with the reduction ratio and the size. Its compact design saves a lot of space and it is also easy to install and set up. It is cost-efficient and suitable for applications with standard backlash requirements. It has a hollow keyed shaft that is covered by a protective shield cover, or a hollow untapped shaft complete with with protective cover and shrink disc, or a solid keyed shaft.