41pcs set Drill Guide Kit Dowel Bit Set Jig Joints Alignment Pins Doweling Jig Hole Saw Tools Specification: Brand new (Random Color) Carbon steel wood boring drill bits: 6mm, 8mm,10mm. Dowel pins: 6mm, 8mm,10mm The surfaces of Drill bits are chrome plated, has high hardness and wear resistance for extended work piece life. For producing E, L and T joints. Package included: 3 x Drill bits 3 x Limit rings 3 x Dowel-pinning 10 x 6mm Dowel pins 10 x 8mm Dowel pins 10 x 10mm Dowel pins 1 x Drill Guide 1 x Wrench Note: Please allow 1-5mm errors due to manual measurement. Due to light and screen setting difference, the color of item may be slightly different from pictures.