• This Marshalltown Tuckpointer has a tempered blade that is fully ground and polished, with a hardwood handle and a metal ferrule securely attached. This blade size and shape allow for easy access between bricks. At Quality Glass Block and Window Company, we offer multiple options for glass block designs, styles, shapes and sizes. We offer glass block products that vary by light transmission and levels of transparency so that you can choose the perfect level of privacy, and we provide related products and accessories. Our experts can help you select the product that is right for you.