It is a skeleton color with a sense of transparency. It is an auto lock slide. Blade thickness: 0. 38 mm. Body: ABS resin. Blade: Alloy tool steel (SKS 81). Total length (mm): 147. Applicable replacement blade: BA-10P / BA-50P / BA-150 / BA-52P / BA-160E / BA-4000-ON. Mass: 38g. NT is a Japanese company that manufactures and sells NT Cutters, spare blades, Dresser, and industrial sanders. NT sells goods for domestic and more than 100 foreign countries. NT is also developing new products with their own technology and unique ideas. In 1959, NT developed NT Cutter, took out a patent on it and started the sales for NT Cutter. It was the first time in the world that "Sharp Knife" (presently named "Cutter Knife") was introduced in the market. NT , as a pioneer of cutter knives, has been developing and producing products to suit various people from children to adults and for a variety of different usage. Our first priority while developing our products is usability and safety for any users; therefore we have always been developing the products to work better, more efficiently and have a better design focusing exclusively on details. We have been sticking to "MADE IN JAPAN". Especially for our blades, we have a lot of procedures to examine the blades at the factory, for the hardness, the toughness and the segment to snap off. Not only do we test by checking the digital data, but we also concentrate on the test by well-trained workers. We believe the examination by our well-trained workers on sight and their judgement is much more reliable and useful than digital readouts. We will keep manufacturing all of our products in Japan with our pride to supply safe and dependable products to our precious customers.