1、These spade drill bits made of high quality high carbon steel, high temperature quenching, high hardness, strong toughness, and the cutting edge is specially treated, sharp and High quality 2、Designed with side cutting spurs, sharp edge and cutting speed. 3、With groove and flat paddle design features, make sure smooth chip removal and hole smooth clean. 4、These woodworking spade drill bits can precisely drill Softwood, Hardwood, Plastic board, Rubber board, Polyurethane and PVC board, these hex shanks are not easy to slip, and more powerful rotation. Easy to operation and can be used on bench drills, DC and AC hand drills. 5、Also come with concentric tip positioning bits, cutting more accurately and labor-saving. Features: 【High Quality】These spade drill bits made of high quality high carbon steel, high temperature quenching, high hardness, strong toughness, and the cutting edge is specially treated, sharp and High quality. 【Sharpness Cutting Edge】Designed with side cutting spurs, sharp edge and cutting speed. Also come with concentric tip positioning bits, cutting more accurately and labor-saving. 【Easy For Chip Removal】With groove and flat paddle design features, make sure smooth chip removal and hole smooth clean. 【Widely Practicality】These woodworking spade drill bits can precisely drill Softwood, Hardwood, Plastic board, Rubber board, Polyurethane and PVC board, these hex shanks are not easy to slip, and more powerful rotation. Easy to operation and can be used on bench drills, DC and AC hand drills. 【Package Included】Total 17pcs woodworking spade drill bits: 6/25"(6mm), 6/19"(8mm), 5/13"(10mm), 12/25"(12mm), 13/25"(13mm), 11/20"(14mm), 5/8"(16mm), 17/24"(18mm), 3/4"（19mm）,11/14"(20mm), 20/23"(22mm), 17/18"(24mm), 49/50"(25mm), 1-1/10" (28mm), 1-6/23"(32mm ), 1-3/8" (35mm), 1-1/2"(38mm), 1pcs connecting rod , 1pcs hex key and storage box. Note: Item color may show sight aberration due to different shooting light and monitor display. Specifications: Material: High carbon steel Type: 15PCS/ 19PCS (Optional) Length: About 5-10/11"(15mm) Shank: 1/4” Package Size: 15.5*5*5cm / 6.1*1.97*1.97in Package weight: 794g / 28oz Package List : 17* Drill Bits 1 * Connecting Rod 1 * Hex Key 1 * Storage Box 17*Drill Bits 1 * Connecting Rod 1 * Hex Key 1 * Storage Box