This Ryobi A99LM2 Door Latch Installation Kit is designed for accurate chiseling and scoring. It features a built-in scoring and chisel tool to minimize the number of tools needed on the jobsite. The onboard 90-degree guide ensures confidence in measurements, eliminating the need for separate measuring tools. It is suitable for both round and square latches with a reversible latch mortiser for clean scores. Onboard storage is provided for bits, guard, and latch mortiser. The kit includes two driver bits: one 1-inch PH2 bit and one 1-inch SL 8-10 bit.