Practice Observation and Logic: Level 1 (ages 7 to 9) (Competitive Mathematics for Gifted Students)

(5 lbs 87PCS)#14 x 6 Black Hex Exterior Lag Screws,6.3x150mm, Structural Wood Screw, Heavy Duty Construction Screw, Rust Resistant, Washer Head, Black Coated Exterior Wood Screws

(5 lbs 74PCS)#14 x 7 Yellow Hex Exterior Lag Screws,6.3x175mm, Structural Wood Screw, Heavy Duty Construction Screw, Rust Resistant, Washer Head, Yellow Coated Exterior Wood Screws

(2 lbs 41PCS)#14 x 5 Black Hex Exterior Lag Screws,6.3x125mm, Structural Wood Screw, Heavy Duty Construction Screw, Rust Resistant, Washer Head, Black Coated Exterior Wood Screws

(5 lbs 188PCS)#12 x 3 Yellow Hex Exterior Lag Screws,5.5x75mm, Structural Wood Screw, Heavy Duty Construction Screw, Rust Resistant, Washer Head, Yellow Coated Exterior Wood Screws

(1 lbs 19PCS)#14 x 5 Yellow Hex Exterior Lag Screws,6.3x125mm, Structural Wood Screw, Heavy Duty Construction Screw, Rust Resistant, Washer Head, Yellow Coated Exterior Wood Screws

(2 lbs 35PCS)#14 x 6 Yellow Hex Exterior Lag Screws,6.3x150mm, Structural Wood Screw, Heavy Duty Construction Screw, Rust Resistant, Washer Head, Yellow Coated Exterior Wood Screws

(5 lbs 74PCS)#14 x 7 Black Hex Exterior Lag Screws,6.3x175mm, Structural Wood Screw, Heavy Duty Construction Screw, Rust Resistant, Washer Head, Black Coated Exterior Wood Screws

(1 lbs 32PCS)#12x3 Black Hex Exterior Lag Screws,5.5x75mm, Structural Wood Screw, Heavy Duty Construction Screw, Rust Resistant, Washer Head, Black Coated Exterior Wood Screws