7 pcs Square Hole Mortise Chisel Drill Bit Tools, HSS Woodworking Hole Saw Mortising Chisel Drill Bit Set, Different Sizes 1/4" 5/16" 3/8" 1/2" 9/16" 5/8" 3/4" Specification: Material: High Speed Steel(HSS) Hardness: Up to HRC48~50 Shape of hole: square, rectangle Shaft length ( Drilling depth ): -1/4"(6.4mm): 45mm -5/16"(8mm): 60mm -3/8" (9.5mm): 60mm -1/2"(12.7mm): 60mm -9/16" (14mm): 75mm -5/8"(16mm) : 75mm -3/4" (19mm): 75mm Clamping shank diameter: 19mm (Round) Package included: 1 x 1/4" (6.4mm) 1 x 5/16" (8mm) 1 x 3/8" (9.5mm) 1 x 1/2" (12.7mm) 1 x 9/16" (14mm) 1 x 5/8" (16mm) 1 x 3/4" (19mm) Note: * Square hole drill can not be used on an electric drill, drill square holes need to fit a square hole drill drilling (mortise and tenon machine) to use. * To avoid drill bits become overheated and get burned up due to fast rotary friction, we suggest use cutting fluid to keep the bits cold during usage. Warm Notice: dear customers, your satisfaction is our top concern, if you receive any defective products, please never hesitate to contact us, we offer 30days return policy, thanks much :)

5. These woodworking morstising chisel bits set fit mortise and drill accessories, mainly used for woodworking aspects in construction, installation, renovation, decoration industry, etc. 4. Woodworking drill bit sets with long drill core and square chisel, easy to lock the hole on the wood, can reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs. 3. These woodworking morstising chisel bits is with high performance flute design geometry for superior chip extraction. 2. The square hole mortise chisels drill bit are made of high-speed steel / HSS, heat treatment, high hardness, lengthened core, high concentricity. 1. You will get 7 different sizes mortise chisel drill bit 1/4 Inch (6.4mm), 5/16 Inch (8mm), 3/8 Inch (9.5mm), 1/2 Inch (12.7mm), 9/16 Inch (14mm), 5/8"(16mm), 3/4 Inch (19mm). They can meet your different ordinary need. Each square hole drill bit is packed in a single plastic case, easy to maintain.

Tool Flute Type: Straight. Brand: YaeKoo. Shank Type: Square. Material: High Speed Steel. Best Sellers Rank: See Top 100 in Tools & Home Improvement. : B087NCD1ZW. Manufacturer: Yaemart Corportation. Date First Available: April 25, 2020. Package Dimensions: 9.69 x 4.41 x 2.09 inches; 3.2 Pounds.