High PrecisionThe T-slot knife features durable carbon steel handle, well-executed with high hardness, precise positioning, high precision, smooth cutting and impact resistance. Heat treatment for a clean cut, can be resharpened. Professional cutting bladeThe blades are made of quality carbide alloy, sharp and durable. The heat-resistant Teflon coating to prevent the build-up of sawdust, resin and pitch, and the curve design arc is good for chip removal. Carbon Steel HandleThe handle of the T-slot cutter is made of heavy-duty carbon steel, with anti-kickback design, durable and solid, giving you maximum strength and durability. Widely UsedThese 2 T-slot router bits are used for hole punching wood, installing spherical door spike, plastic products, lumber, plywood, etc. Package includes1 x T-slot cutter for 1/2 hex bolt and 1 x T-slot cutter for 3/8 hex bolt. Set of 2 T-slot cutters for 3/8 and 1/2 hex screws - Professional Woodworking Tools: Perfect for precision cutting grooves and grooves for shelving and cabinetry projects and also for other simple straight cut applications. - Hardened steel bodies with anti-kickback design ensure secure installation and cut through all materials like plywood, hardwood and softwood. Specifications: Material: Carbide Alloy Stem diameter: 8mm Cutting edge diameter: 12.7mm (1/2), 9.52mm (3/8) Weight: 18g each The package includes: 1 x T-slot cutter 1/2 1 x T-slot cutter 3/8 YOTINO Set of 2 T-Slot Cutters for 3/8 and 1/2 Hex Screw The size within 1-3cm size difference is within the normal range due to manual measurement. Color may have a little difference due to lights, screens.