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 :)