If you are in search of professional and practical wood drill bits kit, then your search is here. Our products can meet your needs. It is made from sturdy alloy steel materials, with good craftsmanship, good hardness, durable and practical, can offer you satisfying using feeling. Features -Color:Silver -Material:Alloy steel -Size:18.00X0.64X0.44cm/7.07X0.25X0.17in -Size:21.00X0.80X0.58cm/8.25X0.31X0.23in -Size:21.00X0.95X0.69cm/8.25X0.37X0.27in -Size:21.00X1.27X0.95cm/8.25X0.50X0.37in -Made of alloy steel materials, this drill bit is wear-resistant, ultra-high hardness, impact resistance, support long time using. -Fits all mortise and drill press attachments. Square hole drills are mainly used in woodworking. -Professional drill bits, can be applied for construction, installation, decoration, decoration and other industries -U-shaped groove design is convenient for the discharge of wood chips and improves the efficiency of turning holes. -High hardness, not easy to deform or break, suitable for most , can offer you great convenience. Package list: 1 x drill bit(6.4mm) 1 x drill bit(8mm) 1 x drill bit(9.5mm) 1 x drill bit(12.7mm)