We use a particular type of saw for cutting masonry and concrete. We need two accessories designed and modelled for this saw so that we can have them manufactured. The main part of the accessories will be made from cast aluminium and there will be a drive train in the accessory made from appropriate steel components. Some parts of the accessory will be made from hard durable plastic. Ultimately we will require 3D drawings in STEP, IGS or other format suitable for a manufacturer to produce a prototype product. We can provide some photographs to show how the accessory must fit to the saw and describe some of the attributes that the accessory must have. This job and its details must be kept confidential as we will want to patent the product. No details of this job can therefore be made public.