The DAVID 400, the first linear stroke sander in DAVID series, gives a complete solution to your craft and hobby activities. Ideal for working on surfaces in slots, recesses and narrow space, makes all the works you're used to more convenient. With variable speed the DAVID 400 can be applied to any situation with perfect speed. The DAVID 400 also lets you work with your creativity in fun, various ways like polishing, cutting, or even engraving.