[NEVER USED] Set of 4 square hole drill bit sets, square hole woodworking drill bit, square hole drill bit, chisel

Product never used, packaging damaged during transport. Unopened product, repackaged in our warehouses, in perfect working condition, warranty available.

Material: High speed steel;

Hardness: HRC48-50, durable and practical, heat treatment, long service life.

4 different sizes: 1/4" (6.35 mm), 5/16" (7.94 mm), 3/8" (9.5 mm), 1/2" (12.7 mm).

Ideal for drilling holes. Create squares in the wood with a chisel or mortise chisel.

It is used in conjunction with the coffee maker mortise lock. If you open the square hole manually, tools such as a hand drill and a hammer are required.

Design to standard chip, easy to use. Remove the side wood chips, improves drilling efficiency. Reduces the intensity of construction work, saves labor for construction workers, accelerates construction speed, and reduces construction costs for the construction, installation, renovation, and decoration industries.