Material: plastic + aluminium alloy. Size: approx. 77 x 98 mm/7.7 x 3.86 mm; Cutting head: 1/4 inch (6.35 mm). The durable ratchet mechanism is both smooth and durable, allows three rotation options. The tail of the handle can be unscrewed, the inner hollow can hold 4-6 packs. The one-handed, auto-locking drill can lock virtually all 1/4″ hex shank accessories., Manufacturer: Yinuneronsty