No need to use the chuck key, there be a ratchet sound prompt when turning the drill chuck, which is extremely easy to operate. It is a practical drill chuck tool that can improve work efficiency. This 1/2-20UNF, 1.5-13mm self-tightening keyless drill chuck. Equipped with a 3/8" to 1/2" drill chuck adapter, it can seamlessly use a variety of shanks including 3/8" SDS-Plus and 1/4" hexagonal shanks, thereby maximizing the versatility of the tool. It is made of high-quality alloy steel, has excellent clamping ability and good wear resistance, and can provide stable performance during use. The 1/2-20UNF thread size and the clamping range of 1.5mm to 13mm make this keyless chuck suitable for most electric drills., Weight: 0.99318249031 pounds, Manufacturer: Hipzeepo