Description:*1. Material: high carbon steel*2. Specification: #5 #6 #8 #10 #12*3. Length: 20 mm(body)*4. Diam: 5-12 mm(body) 6.35 mm(shank) Features:*1. Made of high carbon steel material the drill bit has good sturdiness durability high-temperature resistance and abrasion resistance.*2. It can be easily installed and removed by an L-shape wrench.*3. The screw holes and the counterbore that accommodates the screw cap can be drilled at the same time and kept on the same axis.*4. As long as the fixing screws are loosened and tightened the drilling length of the screws of different lengths can be adjusted.*5. Suitable for drilling machines with collets or joints can drill holes in hard wood and wood. Packing List:countersink drill bit *5L-shape wrench *1 DIY Supplies:Woodworking Certification:CE Type:Core Drill Bit Origin:CN(Origin) length:Length: 20 mm Use:Metal Drilling Model Number:countersink drill bit *5 is_customized:Yes Material:High Carbon Steel carpentry tool:countersink drill bit drill bits:flute drill bit hex shank drill bit:hss drill bit woodworking drill:L-shape wrench Support Wholesale/Dropshipping:Support Fast Shipping