CMT designed this set so you can create window sashes that are as beautiful as they are functional. As an additional feature, the CMT window sash set will also mill perfectly joining 1-3/8" (35mm) rail and stile parts for custom made doors. Like all CMT quality bits, this set includes CMT’s own anti-kickback design, non-stick orange Teflon coating and fatigue-proof steel with long-life carbide tipped cutting edges. Each set contains one 1-1/2" (38.1mm) bit and one 1-3/8" (35mm) bit designed for cutting 1-3/8" (35mm) stock.